Unit 7 Review

There has been reduced rainfall in the area. A drought occurs at the pond. What is the most likely way the drought will affect the animals in the ecosystem?

• The frogs will move

• The squirrels will die

• The dragonflies will thrive

• The fish will die

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A forest fire can be harmful to animals, but some animals survive. Birds can fly to safety, and most mammals can run from fire. Frogs are safe if they can get to water. Some small animals hide in burrows underground. What is a way that describes how an animal is most likely to survive a forest fire?

• Squirrels hide in ponds or streams.

• Bears burrow underground.

• Woodpeckers hide under rocks or in logs.

• Deer can run to a safe area.

Heavy rains flooded the area in the picture above. How might the floods affect the organisms that live there?

• More water will cause animals to grow faster.

• All of the organisms will perish in the wet conditions.

• The flood will not affect the organisms that live in the area.

• Some organisms will leave the area to find a dry environment.

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The needs of some plants are shown here. Which plant is most likely to thrive in drought conditions?

• Cattails

• Cardinal Flower

• Blanket Flower

• Winterberry Holly

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An ecosystem is affected by flooding. Some organisms, such as rabbits, can survive by moving to higher ground. Which organisms in the area are likely to perish in the flood?

• Owls, because they are not strong swimmers

• Grasses, because their roots will rot in wet soil

• Bees, because they are too small to survive in water

• Deer, because they are land animals

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Observe the food chain. Which organism’s population would increase if finches were removed from the ecosystem?

• Grass

• Grasshopper

• Snake

• Hawk

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Students decided to build their own terrarium so they can study how the physical characteristics of an environment support a community. The terrarium has plants, grass, crickets, water, and a lizard. Which organism in the terrarium starts the flow of energy through the food chain?

• Cricket

• Water

• Grass

• Lizard

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The roadrunner is a desert bird that eats fruits and seeds. It also eats insects, spiders, scorpions, and rattlesnakes. What would likely happen if the roadrunner population disappeared from its ecosystem?

• There would be no more fruits or seeds.

• There would a decrease in spider populations.

• The rattlesnake population would stay the same.

• There would be an increase in scorpion populations.

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Flowers depend on sunlight to make their own food. Butterflies eat nectar from the flowers. Toads eat butterflies. How can the flow of energy in the environment be described?

• Toads provide energy to butterflies.

• Nectar provides energy to flowers.

• Flowers provide energy to butterflies.

• Flowers provide energy to the Sun.

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What is one example of the way that energy flows in the food chain above?

• Energy flows from grass to the Sun

• Energy flows from hawks to snakes

• Energy flows from grasshoppers to finches

• Energy flows from snakes to finches

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