7A Final Review
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  • Question 1
    30 seconds
    Q.
    answer choices

    The dinosaur was most likely a ferocious predator

    The dinosaur probably lived in a swamp

    The dinosaur may have been the largest animal alive

    The dinosaur has pointy teeth

  • Question 2
    30 seconds
    Q.
    answer choices

    The girl may have turned her head to say goodbye to her mother.

    The bus driver is watching the children get on the bus.

    There are 4 children in line for the school bus

    The bus has extended its stop sign.

  • Question 3
    30 seconds
    Q.

    Which step MUST BE FOLLOWED before heating a liquid over a flame in science class?

    answer choices

    Put on safety goggles.

    Close all nearby windows.

    Turn on the water in the sink.

    Cover the table top with paper towels.

  • Question 4
    30 seconds
    Q.

    What is the BEST WAY TO IDENTIFY an unknown chemical?

    answer choices

    Waft (wave) the chemical's smell towards the nose.

    Touch the chemical.

    Taste the chemical.

    Get your lab partner to smell the chemical.

  • Question 5
    30 seconds
    Q.

    Why should you repeat an experiment 10 times before you write a conclusion?

    answer choices

    In case you need to change your hypothesis

    To make sure your results are accurate and trustworthy

    To test several variables

    In case your results do not match your original hypothesis

  • Question 6
    30 seconds
    Q.

    What is the FIRST step in the scientific method?

    answer choices

    Analyze Data

    Design an experiment.

    Identify the problem.

    State a hypothesis.

  • Question 7
    30 seconds
    Q.

    The following experiment was set up to test whether a plant grows best in salt or fresh water. What is the MISTAKE?

    answer choices

    Only one tank has a fish.

    Both tanks are at 22 ˚C.

    Each of the tanks has 2 liters of water.

    Some plants are in salt water and some plants are in fresh water.

  • Question 8
    30 seconds
    Q.

    What is the INDEPENDENT variable in the pictured experiment?

    answer choices

    Amount of fertilizer

    Amount of light

    Height of plant

    Amount of water

  • Question 9
    30 seconds
    Q.

    Gathering information using your 5 senses is

    answer choices

    An inference

    a conclusion

    a prediction

    an observation

  • Question 10
    30 seconds
    Q.

    When you decide whether or not the data supports your hypothesis you are

    answer choices

    drawing a conclusion

    making an observation

    analyzing data

    posing a question

  • Question 11
    30 seconds
    Q.

    Sharing your results with others is the skill of

    answer choices

    Communicating

    Hypothesizing

    Observing

    Inferring

  • Question 12
    30 seconds
    Q.

    An educated guess is called

    answer choices

    a model

    an observation

    a hypothesis

    a problem

  • Question 13
    30 seconds
    Q.

    What could be the scientific PROBLEM for the experiment shown in the picture?

    answer choices

    Will light make a plant grow taller?

    Do bean plants grow taller than other types of plants?

    What is the effect of water on plant growth?

    Does fertiizer affect plant growth?

  • Question 14
    30 seconds
    Q.

    The amount of space an object takes up is called

    answer choices

    Mass

    Volume

    Length

    Weight

  • Question 15
    30 seconds
    Q.

    The amount of matter in an object is called

    answer choices

    Mass

    Volume

    Length

    Density

  • Question 16
    30 seconds
    Q.

    The distance between 2 points is called

    answer choices

    Volume

    Area

    Density

    Length

  • Question 17
    30 seconds
    Q.

    The basic SI metric unit for mass is the

    answer choices

    liter

    gram

    meter

    newton

  • Question 18
    30 seconds
    Q.

    The basic SI metric unit for volume is the

    answer choices

    meter

    gram

    liter

    square centimeter

  • Question 19
    30 seconds
    Q.

    The basic SI metric unit for length is the

    answer choices

    meter

    cubic meter

    square meter

    gram

  • Question 20
    30 seconds
    Q.

    The instrument used to measure liquid volume is the

    answer choices

    triple beam balance

    meter stick

    spring scale

    graduated cylinder

  • Question 21
    30 seconds
    Q.

    The instrument used to measure mass is the

    answer choices

    graduated cylinder

    meter stick

    triple beam balance

    thermometer

  • Question 22
    30 seconds
    Q.

    If an object floats in water, then the object's density is

    answer choices

    equal to 1 g/mL

    less than 1 g/mL

    more than 1 g/mL

  • Question 23
    30 seconds
    Q.

    The volume of the box is

    answer choices

    20 cm3

    11 cm3

    40 cm3

    8 cm3

  • Question 24
    30 seconds
    Q.

    What is the length of the black line?

    answer choices

    43 cm

    5 cm

    4 cm

    4.3 cm

  • Question 25
    30 seconds
    Q.

    What is the volume in the graduated cylinder?

    answer choices

    24 mL

    25 mL

    20.5 mL

    20.4 mL

  • Question 26
    30 seconds
    Q.

    Which organism is made of ONLY ONE cell?

    answer choices

    spider

    fungus

    amoeba

    bird

  • Question 27
    30 seconds
    Q.

    The basic unit of structure and function in living things is

    answer choices

    the cell

    the nucleus

    DNA

    a gene

  • Question 28
    30 seconds
    Q.

    Where can this cell be found?

    answer choices

    In an animal

    In a virus

    In a plant

    In a bacteria

  • Question 29
    30 seconds
    Q.

    Cells release the energy stored in foods during the process of

    answer choices

    Photosynthesis

    Respiration

    Excretion

    Mitosis

  • Question 30
    30 seconds
    Q.

    Which of the following directly provides humans with their main source of energy?

    answer choices

    Food

    The sun

    Carbon dioxide

    Water

  • Question 31
    30 seconds
    Q.

    Autotrophs such as plants make their own food during the process of

    answer choices

    Photosynthesis

    Meiosis

    Mitosis

    Respiration

  • Question 32
    30 seconds
    Q.

    What do these organisms have in common?

    answer choices

    They are made of cells.

    They reproduce sexually.

    They all move the same.

    They all have the same adaptations.

  • Question 33
    30 seconds
    Q.

    The structure in a plant that provides shape and support is

    answer choices

    the cell wall

    the chloroplast

    the nucleus

    the cell membrane

  • Question 34
    30 seconds
    Q.

    Through which process does water move across a cell membrane?

    answer choices

    Digestion

    Mitosis

    Locomotion

    Osmosis

  • Question 35
    30 seconds
    Q.

    Which structure in a plant cell captures sunlight during photosynthesis?

    answer choices

    Nucleus

    Mitochondria

    Chloroplast

    Vacuole

  • Question 36
    30 seconds
    Q.

    Which is true about the labeled structures in the cell?

    answer choices

    They carry on life activities inside the cell.

    They usually can be seen without a microscope.

    They cause disease inside the cell.

    They are not important to the cell.

  • Question 37
    30 seconds
    Q.

    What process occurs in all these cells?

    answer choices

    metamorphosis

    reproduction

    photosynthesis

    breathing

  • Question 38
    30 seconds
    Q.

    What structure in found in plant cells, but not in animal cells?

    answer choices

    nucleus

    cell membrane

    cytoplasm

    cell wall

  • Question 39
    30 seconds
    Q.

    Name this cell process.

    answer choices

    Respiration

    Photosynthesis

    Mitosis

    Reproduction

  • Question 40
    30 seconds
    Q.

    Name this cell process.

    answer choices

    Diffusion

    Photosynthesis

    Respiration

    Active transport

  • Question 41
    30 seconds
    Q.

    What part of the microscope is used to focus on a specimen?

    answer choices

    Part C

    Part F

    Part E

    Part B

  • Question 42
    30 seconds
    Q.

    What is the name of part C in the diagram?

    answer choices

    the objective lens

    the eyepiece

    the diaphragm

    the stage

  • Question 43
    30 seconds
    Q.

    What is the function of part E?

    answer choices

    To magnify the image

    To control the amount of light

    To clean the slide

    To hold down the slide

  • Question 44
    30 seconds
    Q.

    Calculate the total magnification using the HIGHER power of a microscope which has a 2x eyepiece, 3x objective, and a 4x objective.

    answer choices

    8 x

    6 x

    24 x

    4 x

  • Question 45
    30 seconds
    Q.

    The total of all the chemical reactions in a cell is called

    answer choices

    homeostasis

    metabolism

    equilibrium

    omnivore

  • Question 46
    30 seconds
    Q.

    Which life function removes wastes from the cell?

    answer choices

    reproduction

    excretion

    photosynthesis

    homeostasis

  • Question 47
    30 seconds
    Q.

    Maintaining stable internal conditions in the cell is called

    answer choices

    mitosis

    synthesis

    metabolism

    homeostasis

  • Question 48
    30 seconds
    Q.

    Which of the following is an autotroph?

    answer choices

    human

    yeast

    grass

    virus

  • Question 49
    30 seconds
    Q.

    An increase in the size of an organism is called

    answer choices

    development

    growth

    simulus

    response

  • Question 50
    30 seconds
    Q.

    What part of the cell regulates what comes in and goes out?

    answer choices

    the vacuole

    the nucleus

    the mitochondria

    the cell membrane

  • Question 51
    30 seconds
    Q.

    When an egg and sperm combine, what is formed?

    answer choices

    a pistil

    a zygote

    a stamen

    a gamete

  • Question 52
    30 seconds
    Q.

    An amoeba divides into 2 equal-sized new organisms. What is this type of asexual reproduction called?

    answer choices

    regeneration

    budding

    binary fission

    sporulation

  • Question 53
    30 seconds
    Q.

    The process in which a sperm and egg combine is called

    answer choices

    fertilization

    development

    budding

    binary fission

  • Question 54
    30 seconds
    Q.

    If a BODY CELL in an organism has 40 chromosomes, how many chromosomes are in each of its SEX CELLS?

    answer choices

    80

    10

    40

    20

  • Question 55
    30 seconds
    Q.

    If a SEX CELL in an organism has 40 chromosomes, how many chromosomes are in each of its BODY CELLS?

    answer choices

    20

    10

    80

    40

  • Question 56
    30 seconds
    Q.

    Which type of asexual reproduction is shown in the diagram?

    answer choices

    budding

    regeneration

    binary fission

    sporulation

  • Question 57
    30 seconds
    Q.

    Which type of asexual reproduction is shown in the diagram?

    answer choices

    sporulation

    binary fission

    regeneration

    budding

  • Question 58
    30 seconds
    Q.

    What is TRUE about sexual reproduction?

    answer choices

    It requires only one parent.

    Genetically identical offspring are produced.

    Sex cells from 2 parents combine to form a new organism.

    It is most common in one-celled organisms.

  • Question 59
    30 seconds
    Q.

    What is TRUE about asexual reproduction?

    answer choices

    It requires 2 parents.

    Genetically different offspring are produced.

    It occurs by the process of mitosis.

    It causes variation in the traits of a species.

  • Question 60
    30 seconds
    Q.

    Sperm and egg combine INSIDE a female mammal. This is called

    answer choices

    internal development

    internal fertilization

    external fertilization

    external development

  • Question 61
    30 seconds
    Q.

    A male fish deposits sperm over the eggs of a female fish in the water. This is called

    answer choices

    external development

    external fertilization

    internal fertilization

    internal development

  • Question 62
    30 seconds
    Q.

    The diagram shows the changes in body structure of a butterfly as it goes through its life cycle. This is best described as

    answer choices

    dynamic equilibrium

    evolution

    competition

    metamorphosis

  • Question 63
    30 seconds
    Q.

    Which part of a plant is the organ of sexual reproduction?

    answer choices

    leaf

    roots

    stem

    flower

  • Question 64
    30 seconds
    Q.

    The transfer of pollen from the stamen of one flower to the pistil of another flower is called

    answer choices

    reproduction

    fertilization

    pollination

    germination

  • Question 65
    30 seconds
    Q.

    Meiosis makes

    answer choices

    sex cells

    body cells

    cancer cells

    bacteria cells

  • Question 66
    30 seconds
    Q.

    The MALE part of the flower is called the

    answer choices

    stamen

    seed

    pistil

    sepal

  • Question 67
    30 seconds
    Q.

    What does pollen contain?

    answer choices

    body cells

    egg cells

    sperm cells

    spores

  • Question 68
    30 seconds
    Q.

    The sprouting of a seed is called

    answer choices

    reproduction

    pollination

    fertilization

    germination

  • Question 69
    30 seconds
    Q.

    Runners, bulbs, and tubers are a type of

    answer choices

    asexual reproduction in plants

    sexual reproduction in plants

    metamorphosis in plants

    cancer development in plants

  • Question 70
    30 seconds
    Q.

    Abnormal cell division causes which health problem?

    answer choices

    cancer

    infection

    aging

    weight gain

  • Question 71
    30 seconds
    Q.

    The numbers in the diagram represent the number of

    answer choices

    genes

    cells

    chromosomes

    ribosomes

  • Question 72
    30 seconds
    Q.

    Which process is responsible for the growth and repair of human tissue?

    answer choices

    evolution

    cell division

    germination

    natural selection

  • Question 73
    30 seconds
    Q.

    One function of a plant's seed is to

    answer choices

    reproduce sexually

    perform photosynthesis

    decompose dead organisms

    provide food for early development and grow into the plant

  • Question 74
    30 seconds
    Q.

    At which stage is fertilization occurring?

    answer choices

    A

    B

    C

    E

  • Question 75
    30 seconds
    Q.

    A trait that helps an organism survive and reproduce is called

    answer choices

    a species

    selection

    an appendix

    an adaptation

  • Question 76
    30 seconds
    Q.

    Which of the following organisms could evolve MOST RAPIDLY?

    answer choices

    bacteria

    humans

    fish

    elephants

  • Question 77
    30 seconds
    Q.

    The number of dark colored moths should increase due to

    answer choices

    natural selection

    starvation

    overproduction

    competition

  • Question 78
    30 seconds
    Q.

    Which layer contains the YOUNGEST fossils?

    answer choices

    Layer A

    Layer B

    Layer C

    Layer D

  • Question 79
    30 seconds
    Q.

    One reason that bacteria can evolve so quickly is that they

    answer choices

    have a long life

    reproduce very quickly

    cause infectious diseases

    do not contain DNA

  • Question 80
    30 seconds
    Q.

    The diagram shows a long period of time. What is being formed?

    answer choices

    a fossil

    an embryo

    a forest

    a lake

  • Question 81
    30 seconds
    Q.

    Natural selection is best described as

    answer choices

    survival and reproduction of the strongest organisms

    survival and reproduction of the largest organisms

    elimination of the smallest organisms by the largest organisms

    survival and reproduction of the best adapted organisms

  • Question 82
    30 seconds
    Q.

    Which dinosaur evolved from Camptosaurus?

    answer choices

    Triceratops

    Stegosaurus

    Theodont

    Apatosaurus

  • Question 83
    30 seconds
    Q.

    The birds' beaks show how the birds

    answer choices

    compete for the same food in their community

    require different amounts of food for survival

    store food for the winter months

    are adapted to get food from different sources

  • Question 84
    30 seconds
    Q.

    What process does the diagram represent?

    answer choices

    natural selection

    ecological succession

    genetic engineering

    asexual reproduction

  • Question 85
    30 seconds
    Q.

    What does the symbol for individual 2 in the top row (generation I.) represent?

    answer choices

    colorblind female

    colorblind male

    female carrier

    normal male

  • Question 86
    30 seconds
    Q.

    How many generations are shown in the pedigree chart?

    answer choices

    4

    3

    5

    1

  • Question 87
    30 seconds
    Q.

    Which of the following is a SON of 5 and 6?

    answer choices

    10

    4

    9

    2

  • Question 88
    30 seconds
    Q.

    Who gave individual 2 in the bottom row (generation III) their colorblind gene?

    answer choices

    # 2 in generation II (middle row)

    # 3 in generation II (middle row)

    # 3 in generation III (bottom row)

    # 1 in generation II (middle row)

  • Question 89
    30 seconds
    Q.

    A normal vision male is represented as

    answer choices

    XX

    XY

    XcY

    XYc

  • Question 90
    30 seconds
    Q.

    Which genotype represents a female carrier for colorblindness?

    answer choices

    XX

    XY

    XcXc

    xcx

  • Question 91
    30 seconds
    Q.

    Purebred means that the genes for a trait are

    answer choices

    different

    the same

    hybrid

    recessive

  • Question 92
    30 seconds
    Q.

    In which gene combination would the RECESSIVE trait appear?

    answer choices

    aa

    Aa

    AA

    aA

  • Question 93
    30 seconds
    Q.

    What is the percent chance of a SHORT offspring in the following Punnett square?

    answer choices

    25%

    50%

    75%

    100%

  • Question 94
    30 seconds
    Q.

    Red eyes (R) are dominant over white eyes (r) in fruit flies. A fruit fly with a genotype of Rr would have

    answer choices

    red eyes

    white eyes

    pink eyes

    red eyes with white spots

  • Question 95
    30 seconds
    Q.

    Red eyes (R) are dominant over white eyes (r) in fruit flies. Which symbol represents a HYBRID fruit fly?

    answer choices

    RR

    Rr

    rr

  • Question 96
    30 seconds
    Q.

    Arrange these in order from SMALLEST to largest.

    answer choices

    gene - nucleus - chromosome

    chromosome - nucleus - gene

    chromosome - gene - nucleus

    gene - chromosome - nucleus

  • Question 97
    30 seconds
    Q.

    Chromosomes are made of the chemical called

    answer choices

    chlorophyll

    DNA

    cellulose

    hemoglobin

  • Question 98
    30 seconds
    Q.

    How many males in the pedigree chart show the trait?

    answer choices

    1

    7

    3

    4

  • Question 99
    30 seconds
    Q.

    What eventually happens to a species when the environment changes and the organisms do NOT adapt?

    answer choices

    classification

    development

    extinction

    regulation

  • Question 100
    30 seconds
    Q.

    Which process is an example of a PHYSICAL change?

    answer choices

    wood burning

    iron rusting

    ice melting

    milk souring

  • Question 101
    30 seconds
    Q.

    How to make chocolate chip cookies: Mix flour, salt, and sugar in a bowl. Crack 2 eggs and add them to the bowl. Stir in chocolate chips. Bake for 20 minutes in the oven. Which is the CHEMICAL change?

    answer choices

    Mix flour, salt, and sugar in a bowl.

    Crack 2 eggs and add them to the bowl.

    Stir in chocolate chips.

    Bake for 20 minutes in the oven.

  • Question 102
    30 seconds
    Q.

    Which model is used by scientists to organize the elements?

    answer choices

    a Punnett square

    the Periodic Table

    a pedigree chart

    the rock cycle

  • Question 103
    30 seconds
    Q.

    Which of these are ELEMENTS?

    answer choices

    hydrochloric acid and carbonic acid

    carbon dioxide and water

    nitrogen and neon

    water and nitrogen

  • Question 104
    30 seconds
    Q.

    All matter is made up of particles called

    answer choices

    cells

    mixtures

    atoms

    compounds

  • Question 105
    30 seconds
    Q.

    Sand and iron particles can be best separated by

    answer choices

    using tweezers

    using a magnet

    adding water, then filtering

    distilling

  • Question 106
    30 seconds
    Q.

    Which lettered diagram best represents a SOLID?

    answer choices

    A

    B

    C

    D

  • Question 107
    30 seconds
    Q.

    Water vapor changes to liquid water during the process of

    answer choices

    dissolving

    melting

    evaporation

    condensation

  • Question 108
    30 seconds
    Q.

    As water temperature increases, solubility of the substances

    answer choices

    decreases

    increases

    increases, then decreases

    decreases, then increases

  • Question 109
    30 seconds
    Q.

    As the temperature is increased from 20˚C to 60˚C, how many more grams of Substance B can be dissolved in 100 mL of water?

    answer choices

    2 g

    10 g

    20 g

    40 g

  • Question 110
    30 seconds
    Q.

    Which is a CHEMICAL property of a mineral?

    answer choices

    breaks easily when struck with a hammer

    bubbles when it reacts with acid

    is easily scratched by a fingernail

    reflects light from its surface

  • Question 111
    30 seconds
    Q.

    Which graphs shows that "as temperature increases, more grams can be dissolved"?

    answer choices

    A

    B

    C

    D

  • Question 112
    30 seconds
    Q.

    Which of the following is a physical property of NONMETALS?

    answer choices

    malleability

    ductility

    good conductor

    brittle

  • Question 113
    30 seconds
    Q.

    When nitrogen and hydrogen combine chemically, the mass of the product is

    answer choices

    greater than the mass of the nitrogen plus the mass of the hydrogen

    equal to the mass of the nitrogen plus the mass of the hydrogen

    equal to the mass of the nitrogen

    less than the mass of the hydrogen

  • Question 114
    30 seconds
    Q.

    Liquid water turns into an ice cube during the process of

    answer choices

    dissolving

    melting

    freezing

    evaporating

  • Question 115
    30 seconds
    Q.

    How many PROTONS does Fluorine have?

    answer choices

    9

    10

    19

    28

  • Question 116
    30 seconds
    Q.

    How many NEUTRONS does Fluorine have?

    answer choices

    9

    10

    19

    28

  • Question 117
    30 seconds
    Q.

    How many ELECTRONS are in a neutral atom of Fluorine?

    answer choices

    9

    10

    19

    28

  • Question 118
    30 seconds
    Q.

    Which of the following is classified as a METAL?

    answer choices

    Sn

    Ge

    As

    Sb

  • Question 119
    30 seconds
    Q.

    Which of the following is classified as a NON-METAL?

    answer choices

    B

    Al

    Si

    C

  • Question 120
    30 seconds
    Q.

    What is TRUE about noble gases?

    answer choices

    They are in the last column of the periodic table.

    They react with many other elements.

    They have 4 valence electrons.

    They are classified as metalloids.

  • Question 121
    30 seconds
    Q.

    Which is classified as MATTER?

    answer choices

    sunlight

    electricity

    water

    heat

  • Question 122
    30 seconds
    Q.

    Which is a CHEMICAL property of water?

    answer choices

    dissolves salt

    boils at 100 degrees celsius

    density = 1.0 g/mL

    reacts with Alkaseltzer

  • Question 123
    30 seconds
    Q.

    What is the density of a substance that has a volume of 20 mL and a mass of 10 g?

    answer choices

    200 g/mL

    0.5 g/mL

    2 g/mL

    10 g/mL

  • Question 124
    30 seconds
    Q.

    How can you SPEED up the rate of dissolving?

    answer choices

    use more solute

    crush the solute

    cool the solvent

    use larger particles of solute

  • Question 125
    30 seconds
    Q.

    As the population of mice in a barn decreases, the population of cats that depend on the mice for food will

    answer choices

    decrease in number

    reproduce faster

    begin to produce their own food

    increase in number

  • Question 126
    30 seconds
    Q.

    Different species of carnivorous animals that share the same habitat in an ecosystem may

    answer choices

    become decomposers

    produce their own food

    become herbivores

    compete for food

  • Question 127
    30 seconds
    Q.

    One consumer in the fish tank ecosystem is the

    answer choices

    snail

    water

    green plant

    rock

  • Question 128
    30 seconds
    Q.

    How do decomposers obtain their food?

    answer choices

    hunting and killing prey for food

    producing food from oxygen and sunlight

    changing carbon dioxide and water into food

    breaking down and absorbing food from dead organisms

  • Question 129
    30 seconds
    Q.

    Grasses, flowering plants, and trees are called producers because they make

    answer choices

    food

    water

    carbon dioxide

    minerals

  • Question 130
    30 seconds
    Q.

    The main source of energy for a desert community is the

    answer choices

    sun

    plants

    sand

    animals

  • Question 131
    30 seconds
    Q.

    Which statement best describes the relationship between the rabbit and the grass?

    answer choices

    The grass supplies food and carbon dioxide to the rabbit.

    The rabbit supplies food and oxygen to the grass.

    The grass supplies food and oxygen to the rabbit.

    The rabbit supplies food and carbon dioxide to the grass.

  • Question 132
    30 seconds
    Q.

    Why are the fish able to survive in the pond?

    answer choices

    The fish use oxygen produced by the plants.

    The fish use carbon dioxide produced by the plants.

    The plants use chlorophyll produced by the fish.

    The plants use oxygen produced by the fish.

  • Question 133
    30 seconds
    Q.

    Which material is being cycled between the living and nonliving environments?

    answer choices

    water

    carbon dioxide

    oxygen

    nitrogen

  • Question 134
    30 seconds
    Q.

    All food chains begin with

    answer choices

    a producer

    a carnivore

    an omnivore

    an herbivore

  • Question 135
    30 seconds
    Q.

    Name one producer in this food web.

    answer choices

    rabbits

    grasses

    mice

    snakes

  • Question 136
    30 seconds
    Q.

    Which organisms obtain energy for growth and development directly from the Sun?

    answer choices

    caterpillars

    wheat plants

    frogs

    hawks

  • Question 137
    30 seconds
    Q.

    Name an herbivore in this food web.

    answer choices

    snakes

    mice

    foxes

    owls

  • Question 138
    30 seconds
    Q.

    Which statement would be TRUE if all the snakes disappeared?

    answer choices

    The wheat plant population would not be affected.

    The rabbit population would increase.

    The owl population would increase.

    The mice population would decrease.

  • Question 139
    30 seconds
    Q.

    Which organisms compete to eat the rabbits?

    answer choices

    grasses and mice

    owls and mice

    grasses and wheat plants

    snakes and owls

  • Question 140
    30 seconds
    Q.

    Which organisms would be affected first if the wheat plants disappeared?

    answer choices

    rabbits

    mice

    owls

    snakes

  • Question 141
    30 seconds
    Q.

    Which of the following is a food chain shown in this food web?

    answer choices

    mice –> snake –> owl

    wheat plant –> rabbit –> snake

    grass –> mice –> rabbit

    grass –> mice –> owl

  • Question 142
    30 seconds
    Q.

    Which organism correctly completes the food web at A?

    answer choices

    hawk

    bacteria

    mice

    trees

  • Question 143
    30 seconds
    Q.

    If two organisms are in the same family, they must

    answer choices

    be in the same species

    be in the same kingdom but different phylum

    be in different kingdoms

    be in the same kingdom and phylum

  • Question 144
    30 seconds
    Q.

    Which of the following lists the levels of classification in order from LARGEST to smallest?

    answer choices

    kingdom, genus, phylum, species

    phylum, kingdom, species, genus

    kingdom, phylum, class, order

    phylum, order, class, species

  • Question 145
    30 seconds
    Q.

    "Homo sapiens," the scientific name for the human, refers to the human's

    answer choices

    kingdom and phylum

    kingdom and species

    genus and phylum

    genus and species

  • Question 146
    30 seconds
    Q.

    The closest relative of "Felis domestica" is

    answer choices

    Quercus alba

    Equua zebra

    Felis trigris

    Canus lupus

  • Question 147
    30 seconds
    Q.

    Which group contains the greatest variety of living things?

    answer choices

    kingdom

    phylum

    class

    order

  • Question 148
    30 seconds
    Q.

    Which is a member of the protist kingdom?

    answer choices

    mosquito

    moss

    amoeba

    yeast

  • Question 149
    30 seconds
    Q.

    Which two organisms are in the same kingdom?

    answer choices

    fish and snake

    snake and paramecium

    bean plant and paramecium

    fish and bean plant

  • Question 150
    30 seconds
    Q.

    What causes an object's motion to change?

    answer choices

    its volume

    a balanced force

    an unbalanced force

    its mass

  • Question 151
    30 seconds
    Q.

    The diagrams show a person moving a 50-kilogram object up a ramp. Which diagram shows the MOST amount of friction on the object?

    answer choices

    A

    B

    C

    D

  • Question 152
    30 seconds
    Q.

    The two dogs are pulling on a rope with constant but unequal forces. In which direction will they move?

    answer choices

    north

    south

    east

    west

  • Question 153
    30 seconds
    Q.

    Which of the following is NOT considered "work" in science?

    answer choices

    reading a book during class

    blowing a feather off your desk

    picking a piece of paper off the floor

    taking a pen out of your pencil case

  • Question 154
    30 seconds
    Q.

    The roller coaster rolls down the first hill (from a to b to c) and then up the second hill (from c to d). When does the roller coaster have the GREATEST KINETIC ENERGY?

    answer choices

    at Position A

    at Position B

    at Position C

    at Position D

  • Question 155
    30 seconds
    Q.

    The first diagram shows a spring scale being used to weigh a 100-gram mass. What will the pointer read when the same spring scale weighs a 400-gram mass?

    answer choices

    Pointer reads 1

    Pointer reads 2

    Pointer reads 0.5

    Pointer reads 4

  • Question 156
    30 seconds
    Q.

    What energy change occurs while a child is riding on a sled down a steep, snow-covered hill?

    answer choices

    Kinetic energy decreases and potential energy increases.

    Kinetic energy increases and potential energy decreases.

    Both potential energy and kinetic energy decrease.

    Both potential energy and kinetic energy increase.

  • Question 157
    30 seconds
    Q.

    At which temperature does a phase change begin in the graph?

    answer choices

    – 30 ˚C

    0 ˚C

    – 10 ˚C

    18 ˚C

  • Question 158
    30 seconds
    Q.

    What type of energy stored in gasoline is transformed into mechanical energy in a motorcycle engine?

    answer choices

    chemical

    nuclear

    magnetic

    electrical

  • Question 159
    30 seconds
    Q.

    Which is an example of conduction?

    answer choices

    A piece of paper is torn in half.

    Warmed air rises above a lit candle.

    A metal spoon gets warm when used to stir hot soup.

    Sunlight brightens a dark room.

  • Question 160
    30 seconds
    Q.

    What energy transformation occurs after a battery-operated flashlight is turned on?

    answer choices

    electrical –> light –> chemical

    electrical –> chemical –> light

    chemical –> light –> electrical

    chemical –> electrical –> light

  • Question 161
    30 seconds
    Q.

    The first box shows a gas at room temperature. Which diagram shows the result of removing heat from the gas until it freezes?

    answer choices

    Diagram 1

    Diagram 2

    Diagram 3

    Diagram 4

  • Question 162
    30 seconds
    Q.

    Compared to the particles in an ice cube, the particles in liquid water

    answer choices

    have a lower temperature

    are moving faster

    have less kinetic energy

    are closer together

  • Question 163
    30 seconds
    Q.

    In which diagram does the bow and arrow have the GREATEST amount of POTENTIAL energy?

    answer choices

    Diagram 1

    Diagram 2

    Diagram 3

    Diagram 4

  • Question 164
    30 seconds
    Q.

    Which process is represented by letter B?

    answer choices

    condensing

    freezing

    evaporating

    melting

  • Question 165
    30 seconds
    Q.

    Fossil fuels are considered NONRENEWABLE because they

    answer choices

    produce pollution

    are no longer used by humans

    often contain microscopic animals

    take millions of years to form

  • Question 166
    30 seconds
    Q.

    What energy transformation occurs in a burning match?

    answer choices

    chemical to nuclear

    chemical to light and heat

    chemical to heat only

    heat to light only

  • Question 167
    30 seconds
    Q.

    A TV changes electrical energy to sound and light energy. In this process, some energy is

    answer choices

    created

    destroyed

    changed to heat

    changed to matter

  • Question 168
    30 seconds
    Q.

    As the metal ball is heated, which of the following will happen?

    answer choices

    The particles in the ball will move closer together due to contraction.

    The particles in the ball will move closer together due to expansion.

    The particles in the ball will move farther apart due to expansion.

    The particles in the ball will move farther apart due to contraction.

  • Question 169
    30 seconds
    Q.

    A thermometer works on the principle that, when heated, a substance will

    answer choices

    contract

    remain the same size

    expand

    give off light

  • Question 170
    30 seconds
    Q.

    Heat from the sun reaches Earth by

    answer choices

    conduction

    radiation

    convection

    equilibrium

  • Question 171
    30 seconds
    Q.

    Sound travels fastest through

    answer choices

    steel

    air

    water

    a vacuum

  • Question 172
    30 seconds
    Q.

    The loudness of a sound wave depends on its

    answer choices

    amplitude

    wavelength

    frequency

    pitch

  • Question 173
    30 seconds
    Q.

    When a wave bounces off an object it is

    answer choices

    absorbed

    transmitted

    reflected

    refracted

  • Question 174
    30 seconds
    Q.

    The number of waves passing a given point in one second is called

    answer choices

    frequency

    amplitude

    a trough

    a crest

  • Question 175
    30 seconds
    Q.

    Which wave has the highest frequency?

    answer choices

    microwaves

    infrared

    X-rays

    ultraviolet

  • Question 176
    30 seconds
    Q.

    What is TRUE about a green object?

    answer choices

    It absorbs green light only.

    It reflects all wavelengths.

    It reflects green light only.

    It absorbs all wavelengths.

  • Question 177
    30 seconds
    Q.

    Which waves are the only waves that the human eye can see?

    answer choices

    TV waves

    gamma rays

    radio waves

    visible light

  • Question 178
    30 seconds
    Q.

    The highest part of a transverse wave is called the

    answer choices

    trough

    amplitude

    crest

    wavelength

  • Question 179
    30 seconds
    Q.

    Sound travels fastest through a

    answer choices

    solid

    liquid

    gas

    vacuum

  • Question 180
    30 seconds
    Q.

    Which process causes the metal spoon to appear split or broken in the glass of water?

    answer choices

    absorption

    convection

    refraction

    reflection

  • Question 181
    30 seconds
    Q.

    As wavelength increases, frequency

    answer choices

    increases

    is not affected

    decreases

    becomes zero

  • Question 182
    30 seconds
    Q.

    A crowd watches the launching of a rocket from a distance of 5 km. When will they hear the sound of the rocket's engines?

    answer choices

    several seconds before they see the rocket

    several seconds after they see the rocket

    at the same time they see the rocket

  • Question 183
    30 seconds
    Q.

    A clean glass windshield is considered

    answer choices

    opaque

    incandescent

    transparent

    translucent

  • Question 184
    30 seconds
    Q.

    As the air is pumped from the vacuum jar, the sound level of the ringing bell will decrease until it can no longer be heard. This happens because air must be present in the jar in order for

    answer choices

    sound to be transferred

    the rubber to seal the jar

    electricity to flow through the wires

    the bell clanger to vibrate

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