Ecosystem and Biosphere

An organism that creates its own food is called:

• producer

• consumer

• scavenger

• herbivore

Tags

NGSS.MS-LS2-3

A consumer is:

• An organism that produces its own food.

• An organism that does not need food to survive.

• An abiotic organism.

• An organism that cannot produce its own food.

Which of the following two organisms are producers?

• Plants and phytoplankton.

• Plants and consumers.

• Consumers and phytoplankton.

• Phytoplankton and chlorophyll.

Tags

NGSS.MS-LS2-3

A food web is more realistic than a food chain for showing the feeding relationships in ecosystems because:

• It compares the number of consumers to the number of micro-organisms in an ecosystem.

• Food chains use only a small sampling of organisms.

• A food web explains why there are more producers than consumers.

• Producers are usually eaten by many different consumers and most consumers are eaten by more than one predator.

Tags

NGSS.MS-LS2-3

In the figure of food web: What does the praying mantis represent?

• A primary consumer.

• A secondary consumer.

• A tertiary consumer.

• A producer.

Tags

NGSS.MS-LS2-3

Organisms need nutrients in order to

• 
  Carry out essential life functions.

• Recycle chemical compounds.

• Utilize hydrogen and oxygen.

• • Carry out nitrogen fixation.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Which of the following is NOT recycled in the biosphere?

• Nitrogen

• Energy

• Carbon

• Water

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Humans use fossil fuels to provide energy for automobiles and factories. On which cycle would this have the largest impact?

• Carbon

• Water

• Nitrogen

• All of these

Tags

NGSS.MS-ESS3-1

NGSS.MS-ESS3-4

Which process is a major part of both the carbon cycle and the nitrogen cycle?

• • Denitrification

• • Decomposition

• • Cellular respiration

• All of these

Which process converts nitrogen in the form of nitrates and ammonia into nitrogen gas to be released into the atmosphere?

• • Decomposition

• • Denitrification

• • Nitrogen fixation

• • Transpiration