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Science Explainer: Energy flow and the 10 percent rule

Last updated 11 months ago

3 questions

Note from the author:

Read the passage Energy flow and the 10 percent rule. Then answer the questions below.

Instructions

Read the passage Energy flow and the 10 percent rule. Then answer the questions below.

Required

1

Required

2

Required

1

Question 1

1.

Drag each answer choice into the correct space. Not all answer choices will be used.

The maximum number of trophic levels most ecosystems can support is _________ because only ______________________ percent of energy is passed from one trophic level to the next. The majority of the remaining energy is lost as ______________________ .

Other Answer Choices:

five

four

biomass

heat

ten

Question 2

2.

Drag each organism into the correct box that matches its trophic level.

deer
moss
butterfly
owl
phytoplankton
rabbit

Primary producers
Primary consumers
Secondary consumers

Question 3

3.

Which are true about trophic levels and the food chain? Select three correct answers.

Having too many trophic levels is inefficient because so much energy is lost as heat.

Due to the recycling of decomposers, all the lost energy can be reused by producers.

Humans rely on producers' ability to convert solar energy for their survival.

Plants are able to use 90% of the sunlight that reaches the surface of the earth.

Every consumer relies on some producer for energy.