Unit 5 Structure Function

Which set of organs most helps people know if something is cold?

• brain and skin

• heart and tongue

• nose and muscles

• eyes and stomach

Canada geese are landing in a quiet city playground. More people start using the playground. This causes many geese to fly away. In the following weeks, fewer geese land in the playground. Which sentence most likely explains why there are fewer geese?

• They were scared and learned not to come back to that place.

• They were separated from their mates and left to find them.

• They could not find food, so they went to another place to eat.

• They could not hear each other, so they went to a quieter place.

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Which organs work closely together to help a lion find food?

• ears, fur, heart

• eyes, nose, brain

• eyes, lungs, heart

• nose, fur, stomach

The movement of legs allows people to walk. Which three body systems work together closely to give the legs movement?

• muscular, nervous, and skeletal

• digestive, muscular, and respiratory

• circulatory, digestive, and muscular

• circulatory, digestive, respiratory

Snowshoe hares live in wooded areas. In the summer, their fur is brown. In the winter, their fur is white. How does fur help the snowshoe hare?

• keeps the hare warm

• makes the hare move quickly

• hides the hare from predators

• allows the hare to dig burrows.

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A hawk is a bird that eats mice. A hawk can see a mouse on the ground from above. Which is the first step to how a hawk sees a mouse?

• Light enters the hawk's eyes

• Light comes from the sun.

• Light is reflected off of the mouse.

A rabbit hears a predator. Then it runs away. Select all the body parts that work together as the rabbit hears the predator and sends messages to run away.

• Brain

• Ears

• Tail

• Muscles

• Nose

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Where would an animal with thick white fur and a thick layer of fat most likely live?

• in a desert

• in a stream

• in a grassland

• in a polar region

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Which of these is a name for any trait that helps a living thing survive?

• action

• adaptation

• pollination

• conservation

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Rasheed accidentally bumped his leg on a desk. What is the first thing that happened within Rasheed's nervous system?

• He yelled, "Ow!"

• The nerves in his leg sensed pain.

• The leg nerves sent a message to the brain.

• the brain sent a message to the skin in his leg.

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