Ecosystem and Energy Flow Quiz

Which of the following is a biotic factor in an ecosystem?

• Temperature

• Soil pH

• Bacteria

Which process releases carbon dioxide into the atmosphere?

• Photosynthesis

• Cellular respiration

• Nitrogen fixation

Which organism is an autotroph?

• Grass

• Cow

• Human

Tags

NGSS.MS-LS1-6

Which statement best describes the flow of energy in an ecosystem?

• Energy is recycled through decomposers.

• Energy flows in one direction and is lost as heat.

• Energy is stored in abiotic reservoirs.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What level of ecological organization includes both biotic and abiotic factors?

• Community

• Population

• Ecosystem

Tags

NGSS.MS-LS2-3

The primary source of energy for most ecosystems is:

• The moon

• The sun

• Producers

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What happens to energy as it moves up a food chain?

• It increases

• It decreases

• It stays the same

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

A trophic level represents:

• An organism's habitat

• A feeding step in a food chain

• The number of individuals in a population

Tags

NGSS.MS-LS2-3

Which of the following is a decomposer?

• Mushroom

• Fox

• Grasshopper

What is the role of nitrogen-fixing bacteria?

• They break down organic matter

• They convert nitrogen gas into ammonia

• They release oxygen

Tags

NGSS.MS-LS2-3