Food Chains and Webs

What is the primary source of energy for most food webs?

• The Moon

• The Sun

• Wind

• Water

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following best describes a producer in a food web?

• An organism that consumes other organisms

• An organism that decomposes organic material

• An organism that makes its own food through photosynthesis

• An organism that feeds on dead matter

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Explain how energy flows through a food web.

• Energy flows from consumers to producers

• Energy flows from decomposers to producers

• Energy flows from producers to consumers

• Energy flows from consumers to decomposers

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Identify the trophic level of a primary consumer in a food web.

• First trophic level

• Second trophic level

• Third trophic level

• Fourth trophic level

Which of the following organisms is most likely to be at the top of a food web?

• Grass

• Rabbit

• Hawk

• Deer

Tags

NGSS.MS-LS2-3

Describe the impact of removing a top predator from a food web.

• Increase in producer population

• Decrease in primary consumer population

• Increase in secondary consumer population

• Disruption of the entire food web

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

What is the role of decomposers in a food web?

• They produce energy for the food web

• They consume primary consumers

• They break down dead organisms and recycle nutrients

• They compete with producers for sunlight

Tags

NGSS.MS-LS2-3

Calculate the energy transfer efficiency if 1000 J of energy is available at the producer level and 100 J is transferred to the primary consumer level.

• 1%

• 10%

• 50%

• 90%

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Predict the effect on a food web if a disease drastically reduces the population of primary consumers.

• Increase in producer population

• Increase in secondary consumer population

• Decrease in producer population

• No effect on the food web

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which of the following best explains why energy transfer between trophic levels is inefficient?

• Energy is lost as heat

• Energy is destroyed

• Energy is created

• Energy is stored indefinitely

Tags

NGSS.HS-LS1-7