Energy Flow and Matter Recycling

What is the primary source of energy for most ecosystems on Earth?

• Wind

• Sunlight

• Water

• Soil

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

What term describes organisms that produce their own food using sunlight through photosynthesis?

• Consumers

• Decomposers

• Producers

• Predators

Tags

NGSS.MS-LS1-6

Which of the following is an example of a decomposer in an ecosystem?

• Oak tree

• Deer

• Mushroom

• Eagle

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-2

What is the term for the process by which plants convert sunlight into chemical energy stored in glucose?

• Respiration

• Decomposition

• Transpiration

• Photosynthesis

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Which cycle describes the movement of carbon through living organisms, the atmosphere, and the Earth?

• Water cycle

• Carbon cycle

• Nitrogen cycle

• Oxygen cycle

Tags

NGSS.MS-ESS2-1

In a food chain, approximately what percentage of energy is transferred from one trophic level to the next?

• 100%

• 75%

• 50%

• 10%

Tags

NGSS.MS-LS2-3

A student draws a food chain: Grass → Rabbit → Fox. Which organism is the primary consumer in this food chain?

• Grass

• Rabbit

• Fox

• Sun

If decomposers were removed from an ecosystem, what would most likely happen to the nutrients in dead organisms?

• Nutrients would immediately return to the atmosphere

• Nutrients would not be recycled back into the soil

• Nutrients would be absorbed directly by plants

• Nutrients would increase in the food chain

Tags

NGSS.MS-LS2-3

A food web shows that grass is eaten by rabbits and grasshoppers. Rabbits are eaten by foxes, and grasshoppers are eaten by frogs, which are also eaten by foxes. Which organism occupies the highest trophic level?

• Grass

• Rabbit

• Grasshopper

• Fox

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-2

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6