Body Systems
Which structure is made up of different types of tissues working together to perform a specific function?
A organ
B cell
C organ system
D tissue
A organ
Which characteristic is most likely acquired rather than inherited?
A eye color
B height
C ability to solve math problems
D natural hair color
C ability to solve math problems
A student places a closed container of water on a scale and records its weight. The water is then frozen inside the container, and the container is weighed again. Which result is most likely?
A. The container weighs more because the water froze.
B. The container weighs the same because no matter was added or removed.
C. The container weighs less because the water changed state.
D. The weight cannot be measured after freezing.
B. The container weighs the same because no matter was added or removed.
A book is pushed across a desk and then across a rug using the same force. The book slows down faster on the rug. What caused the book to slow down more quickly on the rug?
A. The book had more mass on the rug.
B. Gravity was stronger on the rug.
C. The rug created more friction.
D. The desk created more friction.
C. The rug created more friction.
A lake ecosystem and a stream ecosystem are compared. Lakes have calmer water, while streams have moving water. Which statement best explains how these differences affect the organisms living there?
A. Streams support fewer organisms because the water moves too quickly.
B. Lakes support fewer producers because sunlight cannot reach the water.
C. Streams and lakes support different organisms adapted to water movement.
D. Lakes and streams support the same organisms because both contain freshwater.
C. Streams and lakes support different organisms adapted to water movement.
Which body system is most directly responsible for transporting oxygen and nutrients to cells throughout the body?
A circulatary
B nervous
C digestive
D respiratory
A circulatory
Sea turtles hatch on a beach and move toward the ocean without being taught. Which question best helps determine whether this behavior is instinctual?
A. How fast do the turtles move toward the water?
B. Are the turtles taught to move toward the ocean by their parents?
C. How long does it take the turtles to reach the ocean?
D. Do all sea turtles move toward the ocean without training?
D. Do all sea turtles move toward the ocean without training?
Which observation best suggests that a new substance has formed?
A. Two substances are mixed and a solid forms that was not there before.
B. Ice changes into liquid water.
C. Sugar dissolves completely in water.
D. A piece of metal is bent into a new shape.
A. Two substances are mixed and a solid forms that was not there before.
A cyclist travels 60 meters in 10 seconds. What is the cyclist’s speed?
A. 5 meters per second
B. 6 meters per second
C. 10 meters per second
D. 600 meters per second
B. 6 meters per second
Which organism would be classified as a consumer in a forest ecosystem?
A. Oak tree
B. Mushroom
C. Bacteria
D. Deer
D. Deer
A student eats a sandwich and then goes for a walk. Which pair of body systems works together to break down the food and move nutrients to the muscles?
A nervous and skeletal
B muscular and respiratory
C digestive and circulatory
D skeletal and digestive
C digestive and circulatory
A student notices that siblings often look similar but have different hobbies. Which statement best explains this observation?
A. Physical traits are learned, but hobbies are inherited.
B. Both physical traits and hobbies are inherited.
C. Physical traits are inherited, but hobbies are acquired.
D. Both physical traits and hobbies are acquired.
C. Physical traits are inherited, but hobbies are acquired.
A student mixes cereal and raisins in a bowl. Why does this mixture not form a new substance?
A. The mixture changes color.
B. The mixture contains solids.
C. The mixture takes up more space.
D. The materials can be easily separated.
D. The materials can be easily separated.
A graph shows that an object’s position increases by the same amount every second. Which conclusion best describes the object’s motion?
A. The object is speeding up.
B. The object is slowing down.
C. The object is moving at a constant speed.
D. The object is not moving.
C. The object is moving at a constant speed.
Which group of organisms plays the most important role in breaking down dead plants and animals?
A. Producers
B. Herbivores
C. Carnivores
D. Decomposers
D. Decomposers
A model shows air entering the lungs, oxygen moving into the blood, and carbon dioxide leaving the body. Which statement best explains the purpose of this process?
A. The body is removing waste from the digestive system.
B. The respiratory and circulatory systems work together to supply cells with oxygen.
C. The respiratory system helps muscles move.
D. The circulatory system controls breathing.
B. The respiratory and circulatory systems work together to supply cells with oxygen.
Which behavior is most likely learned?
A. A child learning to swim
B. A baby blinking when a light flashes
C. A bird flying south for the winter
D. A spider spinning a web
A. A child learning to swim
Why are oven mitts often made of thick fabric instead of metal?
A. Fabric is a poor conductor of heat.
B. Fabric melts faster than metal.
C. Fabric produces heat when touched.
D. Fabric absorbs heat and becomes hotter.
A. Fabric is a poor conductor of heat.
A ball is rolled up a ramp and then slows down and stops before rolling back down. What force most directly causes the ball to slow down and change direction?
A. Gravity
B. Friction
C. Magnetism
D. Air pressure
A. Gravity
In a grassland ecosystem, a long drought causes grasses to die. Which effect is most likely to occur next?
A. The predator population increases because prey are easier to find.
B. Herbivore populations decrease due to a lack of food.
C. Decomposer populations disappear because there are no animals.
D. The ecosystem becomes unaffected because grasslands recover quickly.
B. Herbivore populations decrease due to a lack of food.
A city records the average wind speed during different times of the year as shown below. Which conclusion is best supported by this data?
Spring = 8mph
Summer = 5 mph
Fall = 7 mph
Winter = 12 mph
A. Wind speeds are highest during the summer.
B. Wind speeds are generally higher during colder months.
C. Wind speeds remain the same throughout the year.
D. Wind speeds increase steadily from spring to fall.
B. Wind speeds are generally higher during colder months.
A weather map shows warm, moist air moving north and colliding with cooler air. Which weather condition is most likely to occur?
A. Clear skies and calm winds
B. Snow with freezing temperatures
C. Clouds and possible thunderstorms
D. Dry weather with low humidity
C. Clouds and possible thunderstorms
Which factor best explains why coastal North Carolina often experiences milder temperatures than inland areas?
A. Mountains block cold air near the coast.
B. Coastal areas receive less sunlight.
C. Wind always blows inland from the coast.
D. The Atlantic Ocean absorbs and releases heat slowly.
D. The Atlantic Ocean absorbs and releases heat slowly.
Which statement best explains the role of the sun’s energy in the water cycle?
A. The sun provides energy for water to change from liquid to gas.
B. The sun moves water through rivers and streams.
C. The sun causes water vapor to turn into liquid droplets.
D. The sun causes clouds to release precipitation.
A. The sun provides energy for water to change from liquid to gas.
After a rainstorm, puddles disappear over several hours on a warm, sunny day. Which process is responsible for this change?
A. Evaporation
B. Precipitation
C. Transpiration
D. Condensation
A. Evaporation