Flow of Matter and Energy

Which of the following is the name given to organisms that make their own food?

• autotrophs

• heterotrophs

• decomposers

• omnivores

Which of the following is the name given to organisms that feed on dead matter?

• autotrophs

• heterotrophs

• decomposers

• producers

Which of the following is the name given to organisms that must consume other organisms to get energy?

• autotrophs

• heterotrophs

• decomposers

• producers

What term describes the position of an organism on the food chain?

• food web

• energy levels

• trophic levels

• matter cycle

What graphic organizer is represented by the image shown?

• food chain

• food web

• trophic level

• energy pyramid

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

What is the difference between a food chain and a food web?

• A food chain shows the many different food webs in an ecosystem

• A food web shows the many different food chains in an ecosystem

• A food web shows the many different trophic levels in an ecosystem

• A food chain and a food web are the same; there is no difference

Tags

NGSS.MS-LS2-3

Which of the following terms describes the contamination of soil, water, and air?

• extinction

• succession

• erosion

• pollution

What is true about nutrients in the ecosystem (such as water, carbon, and nitrogen)?

• They are not affected by humans in the ecosystem.

• They cannot be recovered if they are lost in the ecosystem.

• They cycle through the ecosystem in different forms to support life.

• They are usually only found in one form in the ecosystem to support life.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of these nitrogen cycle processes converts atmospheric nitrogen to a soil form of nitrogen that is usable by plants?

• nitrogen fixation

• nitrification

• denitrification

• ammonification

• assimilation

What converts nitrogen gas into a usable form for plants and animals?

• bacteria

• rain

• fungi

• car exhaust

Tags

NGSS.MS-LS2-3