Science 3rd Grade A7

Owls are skilled hunters that use their keen eyesight and sharp talons to catch small animals. Some owls also hunt at night. How do hunting behaviors help owls survive and reproduce?

• These behaviors help owls stay hidden from other animals.

• These behaviors allow owls to find food to eat.

• These behaviors help owls build nests more quickly.

• These behaviors help owls find other owls to mate with.

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The wetlands in Florida are home to many species of plants and animals. However, the wetlands are slowly shrinking because of pollution. People want to reduce pollution in the wetlands to protect the plants and animals. How will reducing pollution help the wetlands?

• Reducing pollution will attract more tourists to the area.

• Reducing pollution will make the water cleaner, helping the plants and animals.

• Reducing pollution will cause more plants to die.

• Reducing pollution will help the animals grow bigger.

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Fruit trees rely on bees to pollinate their flowers and produce fruit. Without bees, these trees cannot produce fruit. Which situation will most likely help fruit trees produce more fruit?

• The number of bees in the area decreases.

• More fruit trees are planted near the bees.

• The bee population in the area increases.

• The trees are watered more often.

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Vitamin A is important for people’s vision. People can get vitamin A from carrots, sweet potatoes, and spinach. People’s bodies can also make vitamin A when they eat enough food that contains beta-carotene. Which situation will most likely affect a person’s vision?

• The person eats a diet rich in vitamin A.

• The person avoids foods with vitamin A.

• The person spends time outside in the sunlight.

• The person drinks plenty of water each day.

The eastern box turtle lives in forests and grasslands. The turtle eats plants, insects, and small animals. It also needs a place to dig and hide to protect itself from predators. A new housing development is being built where the eastern box turtle lives. How will this development most likely affect the turtles in the area?

• The turtles will have more food to eat because of the new buildings.

• The turtles will have fewer places to hide from predators.

• The turtles will be able to find new places to dig and lay eggs.

• The turtles will have more space to move around.

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Asian carp were introduced into lakes in the United States to help control algae. However, these fish began to eat the food that other fish rely on. Which effects are most likely to be caused by introducing Asian carp into new ecosystems?

• The number of native fish will decrease because they have less food.

• The water will become cleaner because Asian carp eat algae.

• The number of larger fish will increase because they will have more to eat.

• The number of native plants will increase because Asian carp eat algae.

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