7th Grade Interactions with Living Things Review

1. What are factors in the environment that are living?

• Biotic

• Abiotic

• Population

• Organisms

1. What do several different populations living together make?

• Biosphere

• Organism

• Community

• Ecosystem

1. Which is an example of an abiotic element changing an area?

• 1. Introducing a new type of grass

• 1. Water flooding the area

• 1. Two species of birds competing

• 1. Algae growing on crabgrass

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1. What is grass considered to be since it gets its energy from the sun?

• Consumer

• Parasite

• Decomposer

• Producer

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1. What is a diagram that has arrows showing energy flowing from grass, to a rabbit, to a fox?

• 1. Energy pyramid

• 1. Food web

• 1. Food chain

• 1. Population chart

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1. Why do the arrows point in one direction in a food web?

• 1. They show which animal is bigger

• 1. They show which animals are related

• 1. They show how energy goes to the animal that is eating

• 1. They show how energy goes to the animal that is eaten

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1. What happens to other species in an ecosystem when one species disappears?

• 1. They benefit

• 1. They are thrown out of balance

• 1. They die

• 1. They are unaffected

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1. Why do limiting factors determine an area’s carrying capacity?

• 1. The number of animals is limited

• 1. Ecosystems are small

• 1. Animals need resources to survive

• 1. The number of animals is unlimited

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1. Two members of the same species fight over who gets a certain food.  Members of a different species try to take over a certain nesting area.  What are these both examples of?

• 1. Community

• Competition

• Mutualism

• Commensalism

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1. In which type of symbiosis do both organisms benefit?

• Parasitism

• Mutualism

• Commensalism

• Symbiosis