Unit 8 Science Review

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

• There would be no more fruits or seeds.

• The spider populations would decrease

• The rattlesnake population would stay the same.

• The scorpion population would increase

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Natural forces, such as moving water or strong winds, can move soil from place to place.

If a flood carries away too much of the soil, what will happen to the number of plants and animals in that area?

• The number of plants and animals will increase

• The number of plants and animals will stay the same.

• The number of plants and animals will decrease.

• The number of plants will increase and the number of animals will decrease.

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The study of fossils helps us know —

• about landforms, plants, and animals from times passed

• about battles and wars

• how people lived

• how planets move

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Which event is MOST LIKELY to cause the number of animals living in a forest to decrease?

• warm temperatures

• a long drought

• new tree growth

• increased rainfall

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From which organism does the lizard get its energy in this food chain?

• Maize

• Locust

• Lizard

• Snake

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This is a fossil found recently on a ranch in Texas. What does its structure tell us about the past?

• This is a fossil of a piece of a mushroom. It tells us what the plants were like in the past.

• This is a fossil of a berry, common to trees found on mountain tops. It tells us that the area was once at a higher elevation.

• This is a fossil of a piece of a shell. It tells us that the area was once under water.

• This is a fossil of the wing of a

  ying insect. It tells us what insects were like in the past.

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The weather forcast states that there will be heavy rainfall for a few days in this desert ecosystem. How might this affect the organisms and the environment? Select TWO correct answers.

• Heavy

  flooding will cause some animals to move away.

• The heavy rainfall will cause a drought.

• Flooding will be good for the desert plants.

• Some desert plants will die from too much water.

• Flooding will draw in more animals.

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What is a reason why plants become dormant?

Select TWO correct answers.

• warm temperatures

• dry season

• animal migration

• cold temperatures

Jessie enjoys hiking to the top of Rock Hill when he visits his grandparents’ ranch. He studies rocks and adds the best ones to his collection . After many summers of exploring he has

decided that Rock Hill was completely under water at one time. Which statement below BEST supports his conclusion?

• There is more evidence of wind and water erosion from year to year.

• Rock Hill is the highest point for many miles.

• There are several different varieties of trees and

  flowers on Rock Hill.

• Many of his rocks contain imprints of shells.

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The monarch butterfly lives in areas that have cold winters, when food is scarce. The butterfly has a behavior that helps it survive the winter.

Select the behavior of the monarch butterfly

• It hibernates

• It goes dormant

• It adapts by migrating

• It learns to live in the snow