Cycling of Matter and Energy

In the carbon cycle, organisms exchange ___ with the atmosphere

• glucose

• carbon dioxide

• oxygen

• nitrogen

Tags

NGSS.MS-LS2-3

Plants produce food using energy from the Sun. The matter and energy present in the food is transferred to herbivores and then to carnivores. How is matter returned to the environment?

• by using oxygen to release energy

• by the production of energy in the form of heat

• by the decomposition of dead and decaying matter

• by using carbon dioxide to form organic molecules

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

An energy pyramid is pictured.

Which statement best explains the flow of energy as it moves through the different levels?

• Energy decreases as it is lost as heat to the environment.

• Energy increases as it is gained from the environment.

• Energy is unavailable because it is used up by the organisms at Level 1.

• Energy is transferred as it is produced by organisms in the next level.

Tags

NGSS.MS-LS2-3

In a food chain, what is transferred from one organism to another?

• carbon dioxide

• energy

• heat

• water

Tags

NGSS.MS-LS2-3

Study the diagram of an energy pyramid for an environment. Which statement summarizes the relationship between energy and trophic level?

• Animals in a higher trophic level have more energy available to them.

• Animals in the lowest trophic level have the most energy available to them.

• Energy consumption equals energy production at each trophic level.

• Energy is available equally to organisms at all trophic levels.

Tags

NGSS.MS-LS2-3

Use the diagram that shows an energy pyramid to answer the question. Which statement about the energy pyramid is true?

• The herbivores have more energy available to them than any other type of organism.

• The producers have more energy available to them than the carnivores.

• The producers have less energy available to them than the carnivores.

• The carnivores have more energy available to them than any other type of organism.

Tags

NGSS.MS-LS2-3

Use the diagram that shows a river basin food web to answer the question. Which statement about the food web is true?

• There are more consumers than producers.

• There are more producers than consumers.

• The river basin ecosystem does not contain any carnivores.

• The organisms with the most energy available are the Coyote and Red Fox.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-3

Use the marine food web to answer the question. What would be the most likely effect on the food web if the fish population suddenly decreased significantly?

• The plankton population would decrease.

• The shark population would increase.

• The seal and pelican populations would decrease.

• The krill and squid populations would decrease.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4

How are nutrients produced by decomposers recycled back in the food chain?

• by being eaten by consumers in the food chain

• by being inhaled by consumers from the air

• by being absorbed from the soil by producers

• by being eaten by decomposers in the food chain

Tags

NGSS.MS-LS2-3

Dead matter and waste would pile up without which type of organism?

• decomposer

• consumer

• producer