7th Grade Science: Unit 09 Vocabulary

What is the 10% rule?

• A) Each trophic level can only give 10% of its energy to the next level

• B) Each organism can only use 10% of its energy

• C) Only 10% of organisms survive in each level

• D) 10% of energy is lost at each level

What are autotrophs?

• Organisms that eat other organisms

• Organisms that make food for themselves using light energy, carbon dioxide, and water

• Organisms that eat only plants

• Organisms that eat primary consumers

What is the biosphere?

• The part of the earth that can support life; includes all living things and the places they are found

• The layer of gases surrounding the earth

• The feeding position of organisms

• A model showing energy flow

What is an energy pyramid?

• A model that shows how the energy available to organisms at each trophic (feeding) level of an ecosystem is decreased

• A structure built by animals

• The feeding position of organisms

• A type of consumer

What are heterotrophs?

• Organisms that make their own food

• Organisms that eat other organisms for food

• Organisms that eat only plants

• Organisms that eat primary consumers

What are nutrients?

• Substances that provide nourishment essential for growth and the maintenance of life

• Gases in the air

• Energy stored in molecules

• Organisms that eat only plants

What is a primary consumer?

• Organisms that eat only plants

• Organisms that eat primary consumers

• Organisms that eat secondary consumers

• Organisms that make their own food

What is a secondary consumer?

• Organisms that eat primary consumers

• Organisms that eat only plants

• Organisms that make their own food

• Organisms that eat secondary consumers

What are tertiary consumers?

• Organisms that eat secondary consumers

• Organisms that eat only plants

• Organisms that make their own food

• Organisms that eat primary consumers

What are trophic levels?

• The feeding position of different groups of organisms within all food chains in the biosphere

• The part of the earth that supports life

• A model showing energy flow

• Substances that provide nourishment