Amplify Matter and Energy in Ecosystems

Scientists are studying cellular respiration in a river ecosystem that has plants, animals, and decomposers (which consume dead things). Which group or groups of organisms in the river carry out cellular respiration?

• plants

• animals and decomposers

• all organisms in the river

• animals

Tags

NGSS.MS-LS1-2

NGSS.MS-LS2-3

An ivy plant has been taking in carbon from the air for several hours. Is the ivy in sunlight? What has happened to the number of energy storage molecules in the ivy? The ivy . . .

• is in sunlight. The number of energy storage molecules in the ivy has decreased.

• is in sunlight. The number of energy storage molecules in the ivy has increased.

• is not in sunlight. The number of energy storage molecules in the ivy has decreased.

• is not in sunlight. The number of energy storage molecules in the ivy has increased.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS1-7

Scientists are studying photosynthesis in a desert ecosystem that has plants, animals, and decomposers (which consume dead things). Which group or groups of organisms in the desert carry out photosynthesis?

• plants

• plants and decomposers

• all organisms in the desert

• animals and decomposers

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Reza has a glass ball filled with water that contains tiny plants and shrimp that eat those plants. No material can get in or out, but light can get through the glass when it is placed in sunlight. The number of energy storage molecules in the plants and shrimp started out high, but then the glass ball was moved, and the number of energy storage molecules decreased. Was the glass ball moved into the light or into the dark? What happened to the amount of carbon in the water?

• The glass ball was moved into the dark, and there is less carbon in the water.

• The glass ball was moved into the dark, and there is more carbon in the water.

• The glass ball was moved into the light, and there is less carbon in the water.

• The glass ball was moved into the light, and there is more carbon in the water.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What is a producer?

• organism that cannot make their own food so they eat other organisms

• organism that makes their own food

• organism that break down dead organisms

Tags

NGSS.MS-LS2-3

What is a decomposer?

• an organism that breaks down dead organisms for energy

• an organism that makes its own food

• an organism that eats other organisms

What is a consumer?

• an organism that breaks down dead organisms

• an organism that makes its own energy and food

• an organism that eats other organisms for energy

Tags

NGSS.MS-LS2-2

True or False:

A food web shows how energy flows through an ecosystem

• true

• false

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What is the source of all energy?

• water

• food

• decomposers

• sun

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What do the arrows in a food web show?

• who is the most powerful

• the next organism that uses the energy

• the prey

• the sun

Tags

NGSS.MS-LS2-3