What is an ecosystem? (from NEWSELA reading)

Living things that break down the waste products and dead tissue of plants and animals play the role of:

• consumer

• decomposer

• producer

• invasive species

Tags

NGSS.MS-LS2-3

This term describes the order in which matter and energy move through an ecosystem:

• food chain

• photosynthesis

• producer

• tertiary

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Animals at the very top of the food chain fear no predators, but their population size is controlled by:

• decomposers

• producers

• competition for resources

Tags

NGSS.MS-LS2-1

What is the final link of food chains?

• precipitation

• decomposers

• top predators

• an ecosystem

Tags

NGSS.MS-LS2-3

What is the main source of energy in almost all ecosystems?

• the sun

• the producers

• the decomposers

• the cycling of nutrients

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Examine the energy pyramid. Which organism best represents a secondary consumer?

• grass

• rabbit

• snake

• eagle

Tags

NGSS.MS-LS2-3

Which statement best describes the flow of energy from one feeding level in a food chain to the next?

• much of the energy is lost because it escapes as heat

• almost all of the energy is transferred from one level to the next

Tags

NGSS.MS-LS2-3

Decomposers are key when it comes to cycling __________ through an ecosystem.

• producers

• non living things

• waste

• nutrients

Tags

NGSS.MS-LS2-3

This is an example of a living thing that can disrupt the balance in an ecosystem:

• an invasive species

• native producers

• the water cycle

• lack of nitrogen

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Food chains in an ecosystem overlap to form:

• bacteria and decomposers

• food webs

• nutrient cycling

• photosynthesis