3rd Grade Science Trimestral Exam Review

This environment is home to millions of living things. Each living thing has adaptations that help it survive in the salty water.

• Desert

• Forest

• Ocean

This environment is a very wet place. Too much water can harm plant leaves, so they have grooves that allow water to drain off easily.

• Temperate Forest

• Tropical Forest

• Ocean

Plants in this environment cannot depend on regular rainfall for their water, so their roots are adapted to spread widely or reach down deeply to find water.

• Ocean

• Desert

• Forest

This is an environment in which many trees grow near one another. The tops of tall trees are in sunlight.

• Ocean

• Desert

• Forest

Which is an example of an adaptation coyotes and other desert animals have to keep them cool during the day?

• They hunt during the day.

• They hunt during the night.

• They hunt in big groups.

Which is an example of an adaptation ocean animals have?

• Big ears.

• Gills to get oxygen from water.

• Small eyes.

Why do trees in temperate forests lose their leaves in the fall?

• To burn during a fire.

• To conserve water.

• To produce more fruit.

How do we call an organism that is introduced into a new ecosystem either by accident or on purpose by humans.

• Invasive species

• Ecosystems

• Extinct

Which is an example of a natural event that causes dramatic changes in ecosystems very quickly?

• Fires.

• A spider spinning a web.

• Dinosaurs.

Which of the following organisms break down leaves and dead animals and give nutrients to the soil? SELECT ALL CORRECT ANSWERS.

• Worms

• Mushrooms

• Bacteria

• Flowers

• Deer