The Biosphere

All life on Earth exists in

• an ecosystem

• a biome

• the biosphere

• ecology

Which term describes a group of different species that live together in a defined area?

• a population

• a community

• an ecosystem

• a biosphere

Which is not a level of organization in the biosphere

• Individual

• Biome

• Ecosystem

• Habitat

A dead tree is an example of an abiotic factor.

• True

• False

Tags

NGSS.MS-LS2-3

Primary producers are organisms that

• rely on other organisms for their energy and food supply

• consume plant and animal remains and other dead matter

• use energy they take in from the environment to convert inorganic molecules into complex organic molecules

• obtain energy by eating only plants

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following organisms is a decomposer?

• a fox

• bacteria

• holly

• mountain blue jay

Tags

NGSS.MS-LS2-3

Chemosynthesis is when organisms use heat or chemical energy to combine inorganic molecules in complex organic molecules.

• True

• False

The series of steps in which a large fish eats a small fish that has eaten algae is a

• food web

• food chain

• pyramid of numbers

• pyramid of biomass

Tags

NGSS.MS-LS2-3

The total amount of living tissue at each trophic level in an ecosystem can be shown in a(n)

• energy pyramid

• pyramid of numbers

• biomass pyramid

• biogeochemical cycle

Tags

NGSS.MS-LS2-3

Which group of organisms is always found at the base of a food chain or food web?

• primary producers

• primary consumers

• secondary consumers

• detrivores

Tags

NGSS.MS-LS2-3