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100 questions
The table shows the weights of several students. Which student requires the most force to move his or her
body?
Daniel
Maria
Sally
Tyler
Apples hanging from tree branches eventually fall to the ground. Which force most likely causes the apples to fall to the ground?
gravity
friction
collision
magnetism
Which graph depicts an object whose speed is increasing?
How do plants contribute to the water cycle?
Plants cool the air and create condensation.
Plants warm the air and create precipitation.
C. Plants give off water through transpiration.
Plants give off water in the form of runoff or groundwater.
Which part of the water cycle is occurring when warm, moist air cools and begins forming clouds?
condensation
evaporation
precipitation
transpiration
What is the process by which a liquid becomes a gas?
evaporation
condensation
precipitation
absorption
A group of students weighed a sealed jar full of heavy cream. Then they shook the jar until the cream separated, and then they weighed the jar again. Which of the following would best describe its weight?
The jar will have gained weight because some liquid changed to a solid.
The jar will have gained weight because shaking added energy to it.
The jar will have lost weight because of friction from shaking the liquid.
The jar will have kept the same weight because it did not gain or lose any matter.
Which change would result in a new substance being formed?
sugar dissolving in water
a glass bottle breaking
ice melting in a bowl
a metal can rusting
Which best describes the flow of heat?
from a larger object to a smaller object
from a smaller object to a larger object
from a warmer object to a cooler object
from a cooler object to a warmer object
Which is an example of heat being transferred by conduction?
a furnace heating the air in a school
an ice cube melting in a person’s hand
a pot of water on a stove boiling
the sun heating water in a swimming pool
Which is an example of convection?
the heat coming from a campfire
a spoon in a bowl of soup becoming warmer
warmer water at the surface of a swimming pool
getting a sunburn
Which is the best example of heat transfer by radiation?
cooling off in a pool on a hot day
burning your hand on a hot stove
getting warm by sitting near a campfire
melting ice by dropping it into boiling water
Which describes how wind speed is affected by weather?
Rainy weather causes greater wind speeds.
Warmer weather causes greater wind speeds.
Differences in air pressure cause greater wind speeds.
Small temperature changes cause greater wind speeds.
Which is the best indicator that precipitation is on the way?
low pressure
low humidity
low temperature
low self esteem
The graphic shows a sea breeze. What will most likely happen to the wind after the sun goes down?
The wind will continue to blow in the same direction.
The wind will blow in the opposite direction.
The wind will increase in speed.
The wind will stop blowing.
In which direction do prevailing westerlies flow?
from east to west
from west to east
from north to south
from south to north
Which most likely produces clear, cool weather?
zero air pressure
stable air pressure
a low pressure system
a high pressure system
Which best explains why it is important for people to be able to identify cumulonimbus clouds?
Cumulonimbus clouds can cause mild showers.
Cumulonimbus clouds can cause severe thunderstorms.
Cumulonimbus clouds form near Earth’s surface, causing fog.
Cumulonimbus clouds form when the temperature is below freezing.
What impact does the Gulf Stream have on North Carolina’s coastal climate?
The cold water from the Gulf Stream current cools the land.
The warm water from the Gulf Stream current warms the land.
The cold water from the Gulf Stream current decreases inland wind speeds.
The warm water from the Gulf Stream current increases inland wind speeds.
What guides the cold arctic air that enters North Carolina in the winter months?
jet stream
trade winds
subtropical air mass
maritime polar air mass
When the Pacific Ocean cools down near the coast of South America, and causes weather changes around the world, this in known as
El Niño
La Niña
The Gulf Stream
The Jet Stream
Which characteristic best describes both amoebas and bacteria?
abiotic
multi-celled
single-celled
producers
Which best explains why humans are multi-cellular organisms?
Human cells are too small to function alone.
Human cells join together to form one large cell.
Humans need many cells to carry out life processes.
Humans have many systems that perform the same function.
Which system is most closely associated with the brain?
nervous
muscular
circulatory
respiratory
How does the circulatory system work with the digestive system?
Blood is used to build muscle strength.
Food waste is filtered by the heart and blood vessels.
Food is broken down into usable nutrients that are transported throughout the body.
Food is transported throughout the body.
How are estuary and ocean ecosystems similar?
They both have little biodiversity.
They both contain salt water.
They both contain only freshwater.
They both have extremely cold temperatures.
Bacteria are released into the Gulf of Mexico to help clean up an oil spill. What role do the bacteria serve in the marine ecosystem?
decomposers
consumers
producers
predators
Which organism is a consumer?
tree
human
algae
grass
Which gets all of its energy from the sun?
herbivore
producer
consumer
scavenger
Which population is the primary cause of habitat reduction?
humans
predators
scavengers
decomposers
Which graph represents an object that is moving at constant speed?
Z
Y
W
X
The position vs. time graph below can be used to describe Jim's motion as he rides his motorcycle. Which of the following is true?
Jim and his motorcycle are slowing down.
Jim is riding his motorcycle at a speed of five meters per second.
Jim is riding the motorcycle in a straight line.
Jim and his motorcycle are standing still.
Which will slow an object in motion?
speed
friction
gravity
momentum
Which will require the most force to move?
a 1kg ball
a 10kg ball
a 100kg ball
a 1,000kg ball
The graph displays the motion of two cars. Which statement best describes the motion of the cars displayed in the graph?
Car X traveled on a straighter road than Car Y.
Car X traveled at a constant speed, while Car Y's speed increased.
Car X traveled at a constant speed, while Car Y's speed decreased.
Car Y traveled at a constant speed, while Car X's speed decreased.
Which step of the water cycle is described below?
The water in the air cools off and becomes small droplets of water which stick together to make clouds.
photosynthesis
precipitation
condensation
evaporation
The picture shows a model of the water cycle. In the picture, a bowl that contains water is placed under a heat lamp. Ice cubes are placed on a sheet of plastic that covers the bowl. In the picture, different parts of the water cycle are numbered. Which of these does number 2 represent?
condensation
collection
precipitation
evaporation
What happens in the process of the water cycle?
Water transforms into other types of liquid.
Water changes from one state to another.
Water keeps the same physical properties.
Water becomes a gas in between each step.
A student is comparing the mass of a model airplane to its parts. She places the completed model airplane on one side of the balance.
Which picture best shows the direction of the pointer when the parts are added to the other side of the balance?
Which change is most likely to produce a new substance?
a piece of paper burning
sugar dissolving into water
glass breaking into many pieces
water boiling and creating steam
Which is the best example of conduction?
boiling a pot of water
feeling heat from a fireplace
a hot air balloon rising and falling
touching a hot handle and getting burned
Which is the best example of convection?
a camp fire
a light bulb
a hot air balloon
a microwave oven
Mrs. Warren is giving her class an ice cream party. She needs to keep the ice cream cool until lunchtime. Which would be the best container for storage?
white fabric bag
brown paper bag
covered foam box
uncovered aluminum pot
Jack placed his wooden baseball bat in the sun. The bat
cracked open along the center. What is the most likely reason for this happening?
The wooden bat cools in the sun.
The wooden bat evaporates in the sun.
The sun’s heat causes the molecules in Jack's wooden bat to spread apart.
The sun’s heat causes the molecules in Jack's wooden bat to squish together.
Jackson likes to cook but is always in a hurry. He needs a pot that will cook his food quickly. Which is the best material for his cooking pot?
copper
glass
plastic
wood
Monica notices white, wispy, thin clouds, high in the atmosphere. Which type of weather is most likely taking place?
thunderstorms
fair, pleasant weather
light rainy weather
foggy, overcast conditions
Lucy wants to go to a nearby park in the afternoon. She goes outside before noon and sees big, white, puffy clouds in the sky. Based on the clouds that Lucy sees, what kind of weather should she expect in the afternoon?
fair and mostly sunny
snowy and very cold
rainy with heavy fog
stormy with no sun
The graphic below shows an approaching cold front. What will most likely happen as a result of the approaching cold front?
It will produce no precipitation.
It will produce light for several days precipitation.
It will produce cumulonimbus clouds and heavy thunderstorms.
It will produce fair weather.
Which type of air pressure do clear skies indicate?
high pressure
low pressure
zero pressure
medium pressure
Michael observes the air pressure daily. Over the last couple of days the air pressure has been dropping. What weather will Michael most likely observe as a result?
increasingly clear skies and more wind
increasingly clear skies and dry weather
increasingly cloudy skies and possible storms
increasingly cool weather and sunny days
Which best explains why both cats and humans are multicellular organisms?
They get energy from many food sources.
They get energy from a single food source.
They need only one cell to meet their basic needs.
They need many cells working together to meet their basic needs.
How does the muscular system depend on the nervous system?
The nervous system transports blood to the muscles.
The nervous system provides support for the muscles.
The nervous system supplies food and oxygen to the muscles.
The nervous system sends signals to the muscles to cause movement.
Which system produces red blood cells?
skeletal
nervous
digestive
circulatory
Which best explains the adaptations needed for organisms living in an estuary ecosystem?
Organisms must be adapted to live in salt water.
Organisms must be adapted to live in freshwater.
Organisms must be adapted to live in both fresh water and salt water.
Organisms must be terrestrial organisms.
A crow eats the remains of a dead animal. What type of consumer does this prove the crow to be?
a decomposer
a herbivore
a predator
a scavenger
What type of organisms are responsible for recycling the remains of a dead plant or animal to the soil?
producers
consumers
herbivores
decomposers
Which organisms directly use light energy from the sun to obtain food?
carnivores
producers
consumers
decomposers
Which of these organisms is considered a consumer?
algae
bird
fungi
tree
A hunting dog is shown in the image. Which is most likely a learned characteristic of this animal?
size of ears
sharp teeth
spots
the ability to track rabbits.
Kendra is riding her skateboard on her driveway. She starts at her door and finishes at the end of the driveway.
Then Kendra gets back on her skateboard and begins to move again. The distance/time graph below shows Kendra's motion in relation to her door.
Kendra is riding down a hill.
Kendra's speed is decreasing.
Kendra is moving at a constant speed toward her door.
Kendra's speed is increasing.
Who ran at the greatest speed?
Frank
Brett
Clay
Patricia
Paco throws a ball. What force pulls the ball down toward
the ground?
friction
gravity
inertia
momentum
A soccer ball is rolling across the grass. It begins to slow down. Then it stops. What force caused the motion to stop?
pull
push
friction
gravity
Which of the following shows decreasing speed?
A teacher adds 2 g of chalk to 25 g of vinegar in a tightly sealed jar. The chalk and vinegar react, and gas bubbles form. What is the total mass of the jar’s contents after the reaction takes place?
23 g
25 g
27 g
50 g
Which example shows a new substance being formed?
a candle burning
a shoelace being tied
a pipe being cut in half
a block of ice melting
Which is an example of convection?
the heat coming from a campfire
a spoon in a bowl of soup becoming warmer
warmer water at the surface of a swimming pool
getting a sunburn at the beach
Which type of weather would most likely accompany dark
cumulonimbus clouds?
massive tornado
severe hailstorm
steady rain showers
dangerous thunderstorms
Which type of weather most likely occurs in a high pressure area?
clear
foggy
rainy
snowy
Which weather condition will most likely occur when the
atmospheric pressure in an area begins falling?
dry
cold
rainy
sunny
Which factor is most responsible for the movement of the airshown in the sea breeze diagram?
uneven heating of the air
imbalance in organisms breathing the air
sunlight getting blocked by the land
different levels of liquid in the air
What impact does the Gulf Stream have on North Carolina’s coastal climate?
it warms the nearby land
it cools the nearby land
it prevents hurricanes
it causes increased wind in NC's inland cities
When the Pacific Ocean near South America warms due to decreased tradewinds, it is called _____.
El Niño
La Niña
the jet stream
the Gulf Stream
The prevailing westerlies deliver weather to North Carolina because they blow ____.
east to west
west to east
north to south
south to north
An organism that feeds upon another organism is known as a _______.
consumer
producer
decomposer
messenger
Decomposers are organisms that
use sunlight to produce food.
break down matter from dead plants and animals.
feed upon living organisms.
can only be seen using a microscope.
Micah's teacher asks him to fill out the following chart with examples of terrestrial and aquatic ecosystems.
Which of the following should Micah list in the 'terrestrial ecosystems' column?
ocean
deciduous forest
estuary
salt marsh
Which organism performs all life processes in one cell?
grass
bacteria
butterfly
mushroom
What role does the circulatory system provide to the digestive system?
It transports nutrients to cells.
It releases waste into the blood.
It moves food through the intestines.
It transports food particles to the muscles.
Which is a learned trait?
writing
dimples
tongue rolling
freckles
Which of these is an inherited trait?
dimples
long hair
favorite color
driving ability
How could La Nina affect weather during the summer in North Carolina?
It will not affect it.
It could decrease wind.
It could increase rainfall.
It could decrease rainfall.
Which will most likely be the effect on cloud cover when there is a stationary front in an area?
Low, thick clouds will remain in the area while the front remains stationary.
Light, wispy clouds will remain in the area while the front remains stationary.
Light, variable winds will partly clear the skies until the front begins to move.
High winds will blow clouds away, and skies will be clear and sunny until the front begins to move.
Which best explains why animals need many cells?
to produce their own food
to remove waste materials
to perform all the functions necessary for life
to take in carbon dioxide and release oxygen
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