8th Grade Science STAAR Review
2 years ago
mrsnnewman
Save
Edit
Host a game
Live GameLive
Homework
Solo Practice
Practice
126 QuestionsShow answers
  • Question 1
    30 seconds
    Q. A eukaryote that makes its own food would be classified as a member of which kingdom?
    answer choices
    Fungi 
    Animalia
    Bacteria
    Plantae
  • Question 2
    30 seconds
    Q. The main function of the nervous system is to: 
    answer choices
    Support and protect delicate organs such as the brain, lungs, and heart
    Supply oxygen from the lungs to the blood
    Pump oxygen and nutrients through the blood to every part of the body
    Coordinate all actions and reactions of the body
  • Question 3
    30 seconds
    Q. The function of the respiratory system is to: 
    answer choices
    Convert food into simpler substances for the body to absorb as nutrients
    Supply the blood with oxygen and remove carbon dioxide in the lungs
    Send signals in the form of hormones to the body to control growth, reproduction, and metabolism
    Circulate blood through the body to supply cells with oxygen and nutrients
  • Question 4
    30 seconds
    Q. The body system which filters water and wastes from the blood is the: 
    answer choices
    Excretory system
    Endocrine system
    Digestive system
    Integumentary system
  • Question 5
    30 seconds
    Q. Which is the function of the endocrine system
    answer choices
    to produce offspring
    to separate and eliminate wastes
    to protect the body from disease
    to produce hormones that regulate the body
  • Question 6
    30 seconds
    Q. Which cell structure would carry out the function of photosynthesis?
    answer choices
    Mitochondria
    Chloroplast
    Nucleus
    Vacuole
  • Question 7
    30 seconds
    Q. Both the cell membrane and the cell wall act to protect the organelles within a cell. Which of the following best describes how the cell wall is different from the cell membrane?
    answer choices
    The cell wall is much thinner and more flexible than the cell membrane
    Cell walls are only found in primitive cells and are never found in plant or animal cells 
    The cell wall is found in plant cells but not animal cells
    The cell wall is found in both plant and animal cells
  • Question 8
    30 seconds
    Q. What will cause plant leaves to wilt?
    answer choices
    The chlorplasts absorb less light energy
    The mitochondria change shape
    The vacuoles shrink
    The cell wall thickens
  • Question 9
    45 seconds
    Q. Which would result in the most diverse offspring?
    answer choices
    Bees bringing pollen from the flower of one plant to the flower of another
    An orchid with a slower structure that forces self-pollination
    Planting a cutting from a potato to grow a new potato plant
    An amoeba in a fresh water pond reproducing through binary fission
  • Question 10
    45 seconds
    Q. If an organism reproduces asexually, its offspring will most likely be _____.
    answer choices
    Genetically identical to each other
    Genetically different from each other
    Produced as a result of fertilization
    Produced by specialized cells known as gametes
  • Question 11
    45 seconds
    Q. Which of the following statements is NOT based on the cell theory?
    answer choices
    All living things are made of cells
    Cells can only come from other cells
    Cells carry on similar functions and are the basic unit of life
    Cells must contain chloroplasts
  • Question 12
    60 seconds
    Q. Which best represents the relationship between a cell, a nucleus, a gene, and a chromosome?
    answer choices
    Cell - Nucleus - Gene - Chromosome
    Gene - Chromosome - Nucleus - Cell
    Nucleus - Cell - Gene - Chromosome
    Cell - Nucleus - Chromosome - Gene
  • Question 13
    30 seconds
    Q. What percent of the energy from the producer level is available to the herbivores?
    answer choices
    100%
    90%
    10%
    1%
  • Question 14
    30 seconds
    Q. All of the following are examples of a producer/consumer relationship except --
    answer choices
    water lily and turtle
    algae and snail
    frog and heron
    cattails and insects
  • Question 15
    30 seconds
    Q. Which organism is considered a primary consumer?
    answer choices
    Heron
    Snail
    Frog
    Water lily
  • Question 16
    30 seconds
    Q. Which of the following represents the correct flow of energy in a food chain found within the food web?
    answer choices
    Water lily - insect - frog - turtle
    Algae - insect - frog - fish - heron
    Heron - frog - insect - algae
    Cattail - insect - fish - turtle - heron
  • Question 17
    30 seconds
    Q. Bacteria live in our intestines, use indigestible foods, and produce vitamin K for our bodies. This type of relationship is called --
    answer choices
    predator-prey
    mutualism
    commensalism
    parasitism
  • Question 18
    30 seconds
    Q. The relationship of a hookworm attaching itself to the intestines of a pig and absorbing nutrients from the pig is called --
    answer choices
    commensalism
    parasitism
    mutualism
    competition
  • Question 19
    30 seconds
    Q. In the symbiotic relationship between the pig and the hookworm, the pig is called the --
    answer choices
    producer
    prey
    host
    mutualist
  • Question 20
    30 seconds
    Q. Barnacles are ocean organisms that often attach themselves to whales and filter food from the water as the whale swims. The barnacles do not affect the whale. This type of relationship is called --
    answer choices
    predator-prey
    mutualism
    parasitism
    commensalism
  • Question 21
    30 seconds
    Q. Which of the following organisms is both a predator and a prey?
    answer choices
    Heron
    Fish
    Snail
    Insect
  • Question 22
    30 seconds
    Q. There are 3 species of birds on an island. Bird A has a heavy bill for eating big seeds and. Bird B has a sharply pointed bill for eating insects. Bird C has a sharp bill for eating insects and small seeds. If the insect population suddenly disappeared one season, which bird or birds would probably be least affected that season?
    answer choices
    Bird A
    Bird B
    Bird C
    Bird A and Bird B
  • Question 23
    30 seconds
    Q. Which of the following is part of the theory of natural selection?
    answer choices
    Individuals that acquire characteristics will pass those characteristics on to their offspring
    Most offspring of a species will survive to reproduce
    Individuals within the same population have identical traits
    Individuals that have favorable traits are more likely to survive and reproduce
  • Question 24
    30 seconds
    Q. What is the name for a period of reduced activity that some animals experience during the winter months?
    answer choices
    hibernation
    estivation
    seasonal behavior
    learned behavior
  • Question 25
    120 seconds
    Q. This cat is a member of which genus and species?
    answer choices
    Lynx rufus
    Puma concolor
    Lynx Canadensis
    Herpailurus yaguarondi
  • Question 26
    30 seconds
    Q. The overall charge of the nucleus is...
    answer choices
    Positive
    sometimes positive and sometimes negative
    neutral 
    negative
  • Question 27
    30 seconds
    Q. Neutrons are neutral. This means that...
    answer choices
    neutrons are not involved in chemical reactions
    neutrons are neither acidic nor basic
    neutrons do not have a charge
    neutrons do not have a mass
  • Question 28
    30 seconds
    Q. Which of the following best describes an electron?
    answer choices
    it has no charge and about the same mass as a proton
    it has a negative charge and much less mass than a proton
    it has a positive charge and much more mass than a neutron
    it has a negative charge and about the same mass as a neutron
  • Question 29
    30 seconds
    Q. Which group on the periodic table is most reactive?
    answer choices
    Group 3
    Group 1
    Group 18
    Group 12
  • Question 30
    30 seconds
    Q. Which group on the periodic table is least reactive?
    answer choices
    Group 1
    Group 13
    Group 5
    Group 18
  • Question 31
    30 seconds
    Q. Which property of an unknown element determines the other elements it will react with?
    answer choices
    The total number of neutrons 
    The total number of particles
    The number of protons in the nucleus
    The number of valence electrons
  • Question 32
    30 seconds
    Q. What do periods determine on the periodic table?
    answer choices
    Valence electrons
    Number of protons
    Number of energy levels
    Number of neutrons
  • Question 33
    30 seconds
    Q. What do groups determine on the periodic table?
    answer choices
    Number of protons
    Number of valence electrons
    Number of neutrons
    Number of energy levels
  • Question 34
    30 seconds
    Q. Sodium, aluminum, and chlorine are alike in that they all three _____
    answer choices
    are compounds
    are nonmetals
    have one valence electron
    have three energy levels
  • Question 35
    30 seconds
    Q. All of these are examples of compounds except _____
    answer choices
    H
    NaCl
    H2O
    PbS
  • Question 36
    30 seconds
    Q. Which of these two combinations of elements are least likely to form a compound?
    answer choices
    helium + neon
    sodium + chlorine
    hydrogen + oxygen
    aluminum + oxygen
  • Question 37
    30 seconds
    Q. How many atoms are in CuSO4?
    answer choices
    3
    4
    5
    6
  • Question 38
    30 seconds
    Q. How many elements are in NaOH3
    answer choices
    3
    4
    5
    6
  • Question 39
    30 seconds
    Q. Most of an atom's mass consists of _____
    answer choices
    electrons
    electrons and neutrons
    protons and neutrons
    electrically charged particles
  • Question 40
    30 seconds
    Q. What does the atomic number tell you?
    answer choices
    The number of neutrons
    The number of protons and neutrons
    The number of protons and electrons
    The number of electrons
  • Question 41
    30 seconds
    Q. What does the atomic mass tell you?
    answer choices
    The number of neutrons
    The number of neutrons and protons
    The number of electrons
    The number of electrons and neutrons
  • Question 42
    30 seconds
    Q. Valence electrons are the _____
    answer choices
    electrons inside the nucleus
    2 electrons in the 1st energy level
    beta particles
    electrons in the outermost energy level
  • Question 43
    30 seconds
    Q. How many phosphorous atoms are in the formula for Sr3(PO4)2?
    answer choices
    2
    3
    4
    8
  • Question 44
    30 seconds
    Q. How many Sodium atoms are in the chemical formula for 3C5H8NNaO4?
    answer choices
    15
    3
    12
    24
  • Question 45
    30 seconds
    Q. If you have a shiny element that conducts electricity and is able to be pounded into thin sheets, then you have a  _____
    answer choices
    metal
    nonmetal
    metalloid
    other
  • Question 46
    30 seconds
    Q. How many nitrogen atoms are in the chemical formula for 4(NH4)2SO4?
    answer choices
    1
    4
    2
    8
  • Question 47
    30 seconds
    Q. How many elements are found in the chemical formula for 4(NH4)2SO4?
    answer choices
    4
    16
    2
    3
  • Question 48
    30 seconds
    Q. Does this chemical equation follow the Law of Conservation of Mass? 
    CH2 + O2 --> CO2 + H2O
    answer choices
    Yes
    No
  • Question 49
    30 seconds
    Q. Does this chemical equation follow the Law of Conservation of Mass?
    2H2O + 3O2 --> 2H + 2HO4
    answer choices
    Yes
    No
  • Question 50
    30 seconds
    Q. Which of these has to occur in order for there to be a chemical change?
    answer choices
    Melting
    Fizzing
    Cutting
    Mixing
  • Question 51
    30 seconds
    Q. What are 5 different things that need to occur for there to be a chemical change?
    answer choices
    Fizz, Aroma, Recolor, Temperature, Substance (new)
    Fire, Acid, Recolor, Temperature, Substance (new)
    Fizz, Aroma, Recoil, Temperature, Substance
    Folding, Aroma, Recolor, Tempering, Substance (new)
  • Question 52
    30 seconds
    Q. Escherichia coli, or E. coli, is a single-celled, prokaryotic organism. These characteristics require E. coli to be classified in the kingdom--
    answer choices
    Protista
    Fungi
    Bacteria
    Plantae
  • Question 53
    30 seconds
    Q. For an investigation, a student measures the speed of a cart as it rolls down a ramp. The student then records data in the table. Which of these best explains the student's data?
    answer choices
    the speed of the cart decreases as the cart rolls down the ramp because of friction between the cart and the ramp
    the speed of the cart increases as the cart rolls down the ramp because the force acting on the cart is greater than the force of gravity
    the speed of the cart increases as the cart rolls down the ramp because the forces acting on the cart are unbalanced
    the speed of the cart decreases as the cart rolls down the ramp because the forces acting on the cart are balanced
  • Question 54
    30 seconds
    Q. When a space shuttle was launched, the astronauts onboard experienced an acceleration of 29.0 m/s2. If one of the astronauts had a mass of 60.0 kg, what net force in Newtons did the astronaut experience?
    answer choices
    1740N
    89N
    740N
    2.07N
  • Question 55
    30 seconds
    Q. A student walks for 2.0 hours and travels 5.0 km. What is the average speed of the student?
    answer choices
    2.5 km/hr
    2.0 km/hr
    10 km/hr
    0.4 km/hr
  • Question 56
    30 seconds
    Q. The homemade cart is being pushed with a force of 25 N. The force causes the cart to move at a constant speed of 3 m/s. What will happen if the force is changed to 35 N?
    answer choices
    the cart will move at a constant speed of 13 m/s
    the speed of the cart will not change
    the speed of the cart will increase
    the speed of the cart will decrease to 1 m/s
  • Question 57
    30 seconds
    Q. Which of these situations could be represented by this graph?
    answer choices
    A student walks 1.5 km to a friend's house in 40 minutes. The two students then walk another 1.5 km to school in 20 minutes
    A student walks 1.5 km to a friend's house in 20 minutes. The two students then walk another 1.5 km to school in 40 minutes
    A student walks 1.5 km to a friend's house in 30 minutes. The two students then walk another 1.5 km to school in 30 minutes
    A student walks 1.5 km to a friend's house in 20 minutes. The two students then walk another 1.5 km to school in 60 minutes
  • Question 58
    30 seconds
    Q. The three vehicles shown are all traveling at a speed of 15 m/s, but only the pickup truck has a changing velocity. The pickup truck has a changing velocity because the pickup truck --
    answer choices
    can accelerate faster than the other
    is traveling in the opposite direction from the other two vehicles
    is traveling on a curve in the road
    needs a large amount of force to move
  • Question 59
    30 seconds
    Q. What is the difference between the velocity and the speed of an object?
    answer choices
    velocity is the change in distance over time, while speed is the change in velocity over time
    velocity has a direction associated with it, while speed has no specific direction
    velocity has no direction associated with it, while speed has a specific direction
    velocity is the change in speed over time, while speed is the change is distance over time
  • Question 60
    30 seconds
    Q. A hockey stick hits a puck on the ice. With respect to Newton's third law of motion, identify an action-reaction pair in terms of objects and forces
    answer choices
    the stick on the puck; the puck on the stick
    the stick on the puck; the puck on the ice
    the puck on the stick; the stick on the ice
    the stick on the ice; the ice on the puck
  • Question 61
    30 seconds
    Q. A released balloon flies across the room. The balloon slows down as the forces become __________. 
    answer choices
    balanced
    frictional
    restricted
    unbalanced
  • Question 62
    30 seconds
    Q. Julio pushes a box up a ramp into a moving truck. Geoffrey lifts the box straight up into the moving truck. Geoffrey says that he is doing more work because lifting the box takes more energy. Is Geoffrey correct?
    answer choices
    yes, using more force to move an object does more work
    yes, because lifting the box straight up does the work faster
    no, Julio is doing more work because he has to travel farther to move the box up the ramp
    no, they are doing the same amount of work because their force multiplied by their distance is the same
  • Question 63
    30 seconds
    Q. Look closely at the diagram that shows a roller coaster at various points along the ride. Why would it make sense for the first hill on many roller coaster rides to be the highest?
    answer choices
    the high potential energy at the start can help the roller coaster climb the next hills if they are lower than the first one
    the total energy of the roller coaster will increase as the ride progresses, so the car must have the most potential energy at the start
    the roller coaster will have more potential energy as it progresses through the ride, so the car must have the least potential energy at the start
    the roller coaster will convert kinetic energy into potential energy after the first hill, so the car must have the least potential energy at the start
  • Question 64
    30 seconds
    Q. Which answer correctly classifies potential and kinetic energy in the activities shown in the picture?
    answer choices
    girl swimming: potential energy
    boy on diving board: kinetic energy
    girl hitting volleyball: potential energy
    boy holding volleyball: kinetic energy
    girl swimming: potential
    boy on diving board: potential
    girl hitting volleyball: kinetic
    boy holding volleyball: kinetic
    girl swimming: kinetic
    boy on diving board: kinetic
    girl hitting volleyball: potential
    boy holding volleyball: potential
    girl swimming: kinetic
    boy on diving board: potential
    girl hitting volleyball: kinetic
    boy holding volleyball: potential
  • Question 65
    30 seconds
    Q. The diagram shows a hot air balloon rising. Propane gas tanks are seen at the bottom of the balloon. What energy transformations occur when propane gas is used to lift the balloon?
    answer choices
    mechanical to light to chemical
    chemical to mechanical to thermal
    thermal to chemical to light
    chemical to thermal to mechanical
  • Question 66
    30 seconds
    Q. Diedra set up the equipment shown to study energy transformations. Which energy transformation occurs between A and B?
    answer choices
    light energy to chemical energy
    chemical energy to electrical energy
    electrical energy to light energy
    chemical energy to sound energy
  • Question 67
    30 seconds
    Q. How much force is needed to accelerate a 3 kg toy car at a rate of 1.5 m/s2
    answer choices
    4.5 N
    4.0 N
    0.5 N
    2.0 N
  • Question 68
    30 seconds
    Q. What is the net force shown in the diagram? 
    answer choices
    20 N
    1.4 N
    110 N
    30 N
  • Question 69
    30 seconds
    Q. Which of the following provides the energy that causes weather?
    answer choices
    fossil fuels
    hydroelectric
    Sun
    water
  • Question 70
    30 seconds
    Q. Which of the following tools would be used to measure air pressure?
    answer choices
    thermometer
    spectroscope
    barometer
    psychrometer
  • Question 71
    30 seconds
    Q. When air is heated, its --
    answer choices
    density increases, forming an area of high pressure
    density increases, forming an area of low pressure
    density decreases, forming an area of high pressure
    density decreases, forming an area of low pressure
  • Question 72
    30 seconds
    Q. Air masses move across Earth's surface because of differences in --
    answer choices
    air pressure
    rainfall
    weather
    elevation
  • Question 73
    30 seconds
    Q. Why does Earth experience unequal heating?
    answer choices
    the atmosphere is not equally distributed around Earth
    Earth is tilted on its axis
    oceans do not equally cover Earth
    Earth's revolution is longer than its rotation
  • Question 74
    30 seconds
    Q. Which of the following is most likely a cause of hurricanes?
    answer choices
    cooler ocean temperatures
    warmer ocean temperatures
    large ocean waves
    strong ocean currents
  • Question 75
    30 seconds
    Q. Which of these best explains why the oceans have a greater impact on the weather than areas over the continents?
    answer choices
    ocean waves move more easily than continental rock
    the oceans contain a wider variety of organisms than the continents
    the oceans store and transfer more heat than the continents
    ocean water contains more salt than most continental lake water
  • Question 76
    30 seconds
    Q. Hurricanes are powerful tropical storms that develop over warm ocean water. Hurricanes draw their energy from the ocean and weaken as they move over land. Which of the following BEST explains how energy is transferred from the ocean to a hurricane?
    answer choices
    evaporating water adds heat to the atmosphere
    rising tides change the level of the ocean surface
    waves cause turbulence in the lower atmosphere
    currents carry warm water along the ocean surface
  • Question 77
    30 seconds
    Q. What is one condition that is necessary for a hurricane to form?
    answer choices
    warm ocean water
    a strong cold front
    cold ocean water
    a strong warm front
  • Question 78
    30 seconds
    Q. The model shows two continental plates. The folded mountains in this model form at which type of plate boundary?
    answer choices
    transform boundary
    divergent boundary
    subduction boundary
    convergent boundary
  • Question 79
    30 seconds
    Q. The river represented by the topographic map shown here is flowing in which direction?
    answer choices
    from north to south
    from south to north
    from east to west
    from west to east
  • Question 80
    30 seconds
    Q. The thick black lines on the map below show the locations of mid-ocean ridges. Which geologic feature is most likely to form at a mid-ocean ridge?
    answer choices
    peninsula
    volcano
    delta
    plateau
  • Question 81
    30 seconds
    Q. The diagram shows an oceanic plate sliding under a continental plate. Based on the diagram, which geologic feature will most likely form as a result of this plate movement?
    answer choices
    a mountain on the edge of the continental plate
    a large, flat floodplain along the edge of the oceanic plate
    a desert on the edge of the continental plate
    a delta along the edge of the oceanic plate
  • Question 82
    30 seconds
    Q. The Himalayan mountains are shown on the map. Four students were asked to identify the geologic process that caused this mountain range to form. Which student correctly identified the geologic process that formed the Himalayan mountains?
    answer choices
    student 1: two continental plates converging
    student 2: an earthquake in a subduction zone
    student 3: a tectonic plate moving over a hot spot
    student 4: movement at a transform fault boundary
  • Question 83
    30 seconds
    Q. A section of a topographic map is shown. What is the difference in elevation in meters between point X and point Y on the map?
    answer choices
    360 m
    340 m
    2,840 m
    260 m
  • Question 84
    30 seconds
    Q. The satellite image below shows a ship channel between South Padre Island and Boca Chica beach in South Texas. Sand is sometimes removed from the ship channel to make it easier for ships to travel. Sand from the bottom was moved to area beaches. Without this transfer of sand, what would most likely occur in this area in the future?
    answer choices
    the ship channel would become deeper, and the island would move west toward the mainland
    the ship channel would become shallower, and the beach would become narrower
    the ship channel would become narrower, and the island would become completely covered with water
    the ship channel would become wider, and the island would sink into the Gulf of Mexico
  • Question 85
    30 seconds
    Q. The points labeled W and Y on the topographic map below show the campsites of two families. Each family hiked to the elevation on the map marked X. The arrows show the paths taken by both families. What was the change in elevation, for the family that took the steepest path to point X?
    answer choices
    120 m
    140 m
    40 m
    60 m
  • Question 86
    30 seconds
    Q. Sea breezes blow from the ocean toward the shore because --
    answer choices
    the Sun heats up the water more quickly than the land
    the Sun heats up the land more quickly than the water
    ocean currents cause the wind to blow toward shore
    breezes are created as Earth rotates on its axis
  • Question 87
    30 seconds
    Q. Ocean ridges, such as Mid-Atlantic ridge, form because--
    answer choices
    as the sea floor spreads apart, sediments gather due to ocean currents
    the pressure of the water causes magma to rise to the surface
    as the sea floor spreads apart, magma pushes to the surface
    the tectonic plates are pushed together, forming underwater mountains
  • Question 88
    30 seconds
    Q. The diagram shows a model of the movement of two tectonic plates. When the plates collide, one plate often moves below the other plate. The rising magma that can result from this type of plate movement may produce --
    answer choices
    fossil layers
    volcanic islands
    deep-sea sediment
    seafloor spreading
  • Question 89
    30 seconds
    Q. The diagram best illustrates how --
    answer choices
    weather is a condition of Earth's lower atmosphere
    water quickly evaporates when air temperatures are warm
    water vapor condenses into water droplets that form clouds
    winds are produced by the uneven heating of Earth's surface
  • Question 90
    30 seconds
    Q. Which of the following best describes the conditions found in the diagram?
    answer choices
    hurricane
    tornado
    tsunami
    water spout
  • Question 91
    30 seconds
    Q. What type of front is represented on this map?
    answer choices
    cold front moving North
    cold front moving South
    warm front moving South
    occluded front
  • Question 92
    30 seconds
    Q. What is the driving force for the events pictured?
    answer choices
    high pressure and low pressure weather gradients
    the Sun heating the air and land creating convection currents
    convection currents within the ocean's water
    plants releasing oxygen and using carbon dioxide due to photosynthesis
  • Question 93
    30 seconds
    Q. On weather maps, there are lines with tiny triangles on one side. This represents --
    answer choices
    cold air moving in the direction the triangles point
    cold air moving opposite the direction the triangles point
    warm air moving in the direction the triangles point
    warm air moving opposite the direction the triangles point
  • Question 94
    30 seconds
    Q. Hurricanes and similar storm systems begin over oceans. The map below shows average surface temperatures of the oceans in the summer. Based on the map, which area probably produced the most violent storm systems?
    answer choices
    area 1
    area 2
    area 3
    area 4
  • Question 95
    30 seconds
    Q. Which kingdom includes only organisms that are heterotrophic and most of which reproduce sexually?
    answer choices
    Fungi
    Plantae
    Protista
    Animalia
  • Question 96
    30 seconds
    Q. Two teams play a game of tug of war. Using the picture what will the result be?
    answer choices
    the rope will be pulled to the east with 25N of net force
    the rope will not move
    the rope will be pulled to the west with 25N of net force
    the rope will be pulled to the east with 275N of net force
  • Question 97
    30 seconds
    Q. Why does the sun appear to be brighter?
    answer choices
    the sun is a different color
    the sun is older
    the sun is closer to Earth
    the sun is made of different elements
  • Question 98
    30 seconds
    Q. Student 1 applies a force of 10N to a wooden board in order to slide it across the table to Student 2. If the force of friction resisting the student's push is 4N, what is the net force acting on the board?
    answer choices
    4N
    6N
    10N
    14N
  • Question 99
    30 seconds
    Q. Both primary and secondary succession begin with pioneer species that --
    answer choices
    change the area and make it safer from predatory organisms
    invade the area so that new organisms cannot be established
    modify the area and allow larger and more complex organisms to appear
    use up the existing resources and prevent establishment of non-native organisms
  • Question 100
    30 seconds
    Q. The San Andreas fault if a transform fault. Which map best predicts the likely movement of land along the fault line over thousands of years?
    answer choices
    A
    B
    C
    D
  • Question 101
    30 seconds
    Q. Which of these changes would likely occur if the rate of Earth's rotation on its axis increased?
    answer choices
    the length of the season would be shorter
    the length of the season would be longer
    the length of a day would be shorter
    the length of a day would be longer
  • Question 102
    30 seconds
    Q. White-tailed ptarmigans lose their brown feathers during winter and grow white feathers. If global climate change leads to the elimination of snow in the habitat of white-tailed ptarmigans, which adaptation is most likely to occur over many generations?
    answer choices
    Birds with white feathers in areas without winter snow will be easier for predators to find. Over time this could lead to white-tailed ptarmigans that have brown feathers throughout the year.
    Birds with brown feathers in areas without snow will be easier for predators to find. Over time this could lead to white-tailed ptarmigans that have white feathers throughout the year.
    Birds with white feathers will be easier to see on the ground in the summer. Over time this could lead to white-tailed ptarmigans that have white feathers throughout the year.
    Birds with brown feathers will be easier to see on the ground in the winter. Over time this could lead to white-tailed ptarmigans that have brown feathers throughout the year.
  • Question 103
    30 seconds
    Q. The graph shows the motion of a ball rolling on a straight track. What was the ball's average speed during the time represented in the graph?
    answer choices
    0.2 m/s
    0.5 m/s
    5.0 m/s
    10.0 m/s
  • Question 104
    30 seconds
    Q. Which statement is not supported by the student's observations?
    answer choices
    a chemical reaction takes place between magnesium and hydrochloric acid
    a gas is released in Test Tube 2
    the substances on both test tubes are reactive only at high temperatures
    energy is released in the reaction involving hydrochloric acid.
  • Question 105
    30 seconds
    Q. To be able to accurately predict when a comet will collide with a planet, it is essential to understand --
    answer choices
    the composition of a planet's atmosphere
    the gravitational attraction that exists between all bodies
    the attraction of opposite poles of a magnet to each other
    the formation of comets
  • Question 106
    30 seconds
    Q. Based on this information, which of the organisms can produce offspring that are genetically identical to the parent organism?
    answer choices
    ferns only
    amoebas and yeasts only
    cats, hydras, frogs, and ferns only
    amoebas, yeasts, hydras, and ferns only
  • Question 107
    30 seconds
    Q. The Hertzsprung-Russell diagram shows how the sun is classified among the stars. A star that is several thousand times brighter than the sun with a temperature lower than 4,000K would classified as --
    answer choices
    a main-sequence star in spectral class B
    a supergiant in spectral class K
    a main-sequence star in spectral class K or M
    a white dwarf in spectral class B
  • Question 108
    30 seconds
    Q. Which objects in the list experience an unbalanced force?
    answer choices
    the book, the ball, and the car
    the ball, the car, and the bird
    the can, the swing, and the bird
    the book, the ball, the can, and the swing
  • Question 109
    30 seconds
    Q. Which graph shows a situation in which the number of predators in a population depends on the number of prey?
    answer choices
    F
    H
    G
    J
  • Question 110
    30 seconds
    Q. A spacecraft had a mass of 500 kg. Which expression can be used to find the spacecraft's acceleration if its engine created a net force of 0.10 N?
    answer choices
    0.10 N / 500 kg
    500 kg x 0.10 N
    500 kg / 0.10 N
    500 kg + 0.10 N
  • Question 111
    30 seconds
    Q. Which student correctly identified the organic compounds in the list?
    answer choices
    student K
    student L
    student M
    student N
  • Question 112
    30 seconds
    Q. What are the most likely dates of the full moons?
    answer choices
    February 5, March 7, April 5, May 4
    February 15, March 17, April 15, May 14
    February 25, March 27, April 25, May  24
    February 29, March 31, April 29, May 28
  • Question 113
    30 seconds
    Q. The drawing shows two identical airplanes at an air show. The airplanes are flying at the same speed. Airplane W is flying 50 m higher than Airplane X. Which statement best describes the energy of the two airplanes?
    answer choices
    airplane W has a greater kinetic energy than airplane X
    the two airplanes have the same gravitational potential energy but different kinetic energies
    airplane X has more gravitational potential energy than airplane W
    the two airplanes have the same kinetic energy but different gravitational potential energies
  • Question 114
    30 seconds
    Q. The satellite photograph shows an area in Alaska after a fire occurred. Which statement best describes the most likely effect the fire had on the river in the 12 months after it occurred?
    answer choices
    Less sediment flowed into the river because the fire heated up the soil and made it drier.
    The amount of vegetation increased and less sediment flowed into the river because the fire produced ash that mixed with the soil.
    More sediment flowed into the river because the fire destroyed most of the vegetation holding the sediment in place.
    More sediment flowed into the river because the fire disrupted animal habitats and caused animals to leave the area.
  • Question 115
    30 seconds
    Q. Four students were asked to name the parts of an atom that determine the atom's identity and chemical properties. The students' responses are shown in the table below. Which student's responses are correct?
    answer choices
    Student 1
    Student 2
    Student 3
    Student 4
  • Question 116
    30 seconds
    Q. A hobbyist collected data about the motion of a toy train on a straight track and then recorded the data in the graph. Which of these accurately describes the motion of the toy train?
    answer choices
    the toy train speeds up while going forward and then slows down
    the toy train slows down while going forward and then moves backward
    the toy train moves forward at a constant speed, slows down, and then stops
    the toy train moves forward at an increasing speed, stops, and then moves forward
  • Question 117
    30 seconds
    Q. Which diagram shows the objects arranged so that a new moon would be visible from Earth?
    answer choices
    A
    B
    C
    D
  • Question 118
    30 seconds
    Q. Atoms of element M have two more valence electrons than atoms of element L. Atoms of element L are more reactive than atoms of element M. Both elements are metals. Which periodic table has the elements placed in locations that match the information provided?
    answer choices
    F
    G
    H
    J
  • Question 119
    30 seconds
    Q. The universe has many different components. Which list places four components of the universe in the most likely order from smallest to largest?
    answer choices
    Planets, stars, galaxies, nebulae
    Nebulae, stars, planets, galaxies
    Galaxies, stars, planets, nebulae
    Planets, stars, nebulae, galaxies
  • Question 120
    30 seconds
    Q. How do the industrial, agricultural, and residential activities of humans most likely affect the groundwater in the area?
    answer choices
    The activities prevent most of the water from evaporating into the atmosphere.
    Pollutants from the activities percolate through the soil and enter the water table.
    The activities replace the groundwater used.
    All of the above
  • Question 121
    30 seconds
    Q. Which table best shows some functions of the circulatory, respiratory, digestive, and endocrine systems?
    answer choices
    A
    B
    C
    D
  • Question 122
    30 seconds
    Q. Which table correctly describes the functions of the cell structures listed?
    answer choices
    F
    G
    H
    J
  • Question 123
    30 seconds
    Q. The model shows Earth in several positions relative to the sun. In which position is it winter in North America?
    answer choices
    position 1 
    position 2
    position 3
    position 4
  • Question 124
    30 seconds
    Q. Which of the substances observed are elements?
    answer choices
    S, Fe, O2, Sr2, and Al
    S, O2, and LiF
    N2O4, O2, and LiF
    N2O4, Fe, Sr, and Al
  • Question 125
    30 seconds
    Q. Green crabs carry a parasitic worm that can infect organisms that prey on the crabs. Which organism is most likely to be infected by this parasite?
    answer choices
    Gulls
    Barnacles
    Marsh periwinkles
    Blue Mussels
  • Question 126
    30 seconds
    Q. Which substances have the same number of carbon atoms?
    answer choices
    1 and 2
    2, 3, and 4
    2 and 3
    1 and 3
Report Quiz
Join a game