Ecosystem

Which statement describes ALL primary producers?

• All make energy-rich compounds that can be used by other organisms.

• All make their own food using the energy of compounds in the environment.

• All take in energy-rich compounds that were made by other organisms.

• All make their own food using the energy of sunlight.

Tags

NGSS.MS-LS1-6

This diagram is a model of a biological process. Which of the following is modeled in the diagram?

• The role of photosynthesis in breaking apart carbohydrates for their energy

• The role of photosynthesis in adding carbon dioxide to the atmosphere

• The role of photosynthesis in transferring carbon from the atmosphere to the biosphere

• The role of photosynthesis in transferring carbon dioxide from the hydrosphere to the biosphere

Tags

NGSS.MS-LS1-6

Ethan is modeling food chains he observes in his local ecosystem. Which of these models represent possible food chains he might observe?

• primary producer -> consumer -> consumer

• consumer -> primary producer -> consumer

• consumer -> consumer -> consumer -> consumer

• primary producer -> consumer -> consumer -> consumer -> consumer

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

The diagram is a model of an energy pyramid of an ecosystem. The levels of the diagram are labeled with percentages. What do the percentages represent?

• The average energy requirements of organisms in each trophic level

• The relative amounts of energy contained by the organisms in each trophic level

• The energy lost as heat from one trophic level to the next

• The rate of conversion of light energy to chemical energy

Tags

NGSS.MS-LS2-3

This pyramid of numbers is modeling organisms within an ecosystem. Which of the feeding interactions below is MOST LIKELY to be part of this ecosystem?

• grasses in a meadow that provide food for many small animals

• a dead whale that provides food for many ocean animals

• an algae colony that provides food for many fish

• a tree that provides food for thousands of insects

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3