Organisms Adaptations and their Ecosystems 7th Grade Science Organisms Adaptations and their Ecosystems

A unit consisting of all the living #1 A unit consisting of all the living and nonliving things in a given area that interact with one another. A: biosphere B: ecosystem C: community D: population

B. ecosystem

Living things in an ecosystem. #2 Living things in an ecosystem. A: abiotic B: ecology C: ecosystem D: biotic

D. Biotic

Non-living things in an ecosystem. #3 Non-living things in an ecosystem. A: abiotic B: biotic C: ecology D: ecosystem

A. Abiotic

#4 *Volcanic eruptions breaking the surface of the ocean. *Lichens move in on an area of bare rock. These are examples of ________ _________. A: Primary succession B: Secondary succession C: Both D: Neither

A. Primary succession

#5 *Farmer plows a field and leaves it unattended. *Hurricane destroys a Coastline. *Forest re-grows after a forest fire. These are examples of ________ _________. A: Primary succession B: Secondary succession C: Both D: Neither

B. Secondary succession

#6 This process is an example of _______ ________. Primary succession Lichens break down the rock with a mild acid. A thin layer of soil is formed. Lichens grow on bare rock. Grasses begin to grow on the soil. This process is an example of _______ ________. Primary succession Secondary succession Decaying organic matter forms a thicker layer of soil. A forest is formed. Trees with deeper roots grow in the deeper layer of soil. Small shrubs begin to grow.

A. Primary succession

What is the major difference between primary and secondary succession? #7 What is the major difference between primary and secondary succession? Primary begins on bare rock. Secondary begins when soil is already present. Secondary begins on bare rock. Primary begins when soil is already present. A: B: C: Both D: Neither

A. Primary begins on bare rock. Secondary begins when soil is already present.

#8 How would secondary succession affect an area that was destroyed by a hurricane? The area would re-grow starting with lichen The area would re-grow starting with grasses-trees-forest A: B: C: The area would never re-grow D: None of these

The area would re-grow starting with grasses-trees-forest B. The area would re-grow starting with grasses-trees-forest

An ecosystem that is in balance. #9 An ecosystem that is in balance. A: Primary community B: Succession community C: Climax community D: None of these

C. Climax Community

#10 How might a cloud of ash from a volcanic eruption that blocks out the sun effect ecosystems? A: Increase temperatures B: Lower temperatures C: Slow the rate of plant growth D: B and C

Slow the rate of plant growth Lower temperatures Slow the rate of plant growth

*Ecological succession helps to maintain equilibrium in an ecosystem. #11 *Ecological succession helps to maintain equilibrium in an ecosystem. How would secondary succession help to restore equilibrium after a flood? A: It increases the number of types of species B: It prevents other species from arriving. C: It slows the rate of plant growth D: B and C

A. It increases the number of types of species

An adaptation of an organisms body. #12 An adaptation of an organisms body. A: Behavioral adaptation B: Structural adaptation C: Climax adaptation D: None of these

B. Structural adaptation

An adaptation of actions that organisms develop to survive. #13 An adaptation of actions that organisms develop to survive. A: Behavioral adaptation B: Structural adaptation C: Climax adaptation D: None of these

A. Behavioral adaptation

#14 African wildebeests migrate across grass lands. What might cause them to migrate farther than normal? A: Too much grass B: A drought C: Both D: Neither

B. A drought

What might happen if an organism is unable to adapt to its ecosystem? #15 What might happen if an organism is unable to adapt to its ecosystem? A: It will survive anyway B: It might become extinct C: Both D: Neither

B. It might become extinct

#16 These are examples of _____ _____. A camel’s hump A giraffe’s long neck A monkey’s opposable thumbs Bison’s hooves These are examples of _____ _____. A. Structural adaptation B. Behavioral adaptation

A. Structural adaptation

#17 These are examples of _____ _____. Fish swimming in a school Wildebeest traveling in herds Monarch butterflies migrating to Mexico Skunks active at night These are examples of _____ _____. A. Structural adaptation B. Behavioral adaptation

B. Behavioral adaptations

#18 You would find the most animal diversity in a meadow with a pond compared to a just a meadow. Why? The meadow and pond have different ecosystems and overlapping ecosystems The Meadow and pond have only one ecosystem with fewer overlapping ecosystems A: B:: C: Both D: None of these

A. The meadow and pond have different ecosystems and overlapping ecosystems

What causes animals to be diverse or different from each other? #19 What causes animals to be diverse or different from each other? Adapting to their environment is not important They must adapt to their environment A: B: C: Both D: Neither

They must adapt to their environment B. They must adapt to their environment

*A nonnative animal is introduced into a mature ecosystem. #20 *A nonnative animal is introduced into a mature ecosystem. *The animal will increase in the new community if ____. the nonnative animal has several natural enemies the nonnative animal has no natural enemies A: B: the nonnative animal can learn to behave like the native animals C: D: Neither

the nonnative animal has no natural enemies. B. the nonnative animal has no natural enemies.

*What happens to the native plant species in this ecosystem? #21 *The weeds in this picture thrive and are able to take over the yard because it has no natural enemies. *What happens to the native plant species in this ecosystem? A: They decrease B: They increase C: Both D: Neither

A. They decrease

Ex: In the left picture, the snakes begin to die from a disease. #22 In order for an ecosystem with high biodiversity to recover, what would organisms need to do if one food source became unavailable? Ex: In the left picture, the snakes begin to die from a disease. A: Move to a different ecosystem B: Eat different food sources C: They would die D: None

B. Eat different food sources

#23 Look at the graph. The population of rabbits decreased greatly between points A and B on the graph. Explain why this change occurred. A disease, limited resources, or some other limiting factor caused the rabbit population to decrease to decrease.

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