Pre-Assessment-The Flow of Energy in Ecosystems (TEKS 7.12.A)

Which is the BEST estimate of the amount of energy available at the secondary consumer level?

• 0.1 J

• 10 J

• 100 J

• 10,000 J

Tags

NGSS.MS-LS2-3

Match the correct amount of energy to the trophic level.

• 200 J

• Primary Consumer

• 20 J

• Producer

• 2,000 J

• Tertiary Consumer

• 20,000 J

• Secondary Consumer

Tags

NGSS.MS-LS2-3

The diagram shows energy flow in a prairie ecosystem. Which statement BEST explains the flow of energy in the ecosystem?

• A. Energy is not conserved in the ecosystem and surroundings.

• B. The most energy is lost to the environment between secondary and tertiary consumers.

• C. The greatest transfer of energy is from the producers to the primary consumers.

• D. Energy transfer to the coyote would decrease if the coyote preyed directly on prairie dogs.

Tags

NGSS.MS-LS2-3

Malika is making a food energy diagram based on the following model. Which organism belongs to each level in an energy diagram?

(Look at the food web)

• Primary consumer

• plants

• Secondary consumer

• boa

• Primary producer

• insect

• Tertiary consumer

• iguana

Tags

NGSS.MS-LS2-3

Which statement BEST describes the transfer of energy from organism to organism as matter moves through a food web?

• A. Energy moves in both directions between each trophic level.

• B. Most of the energy is lost to the environment between each trophic level.

• C. Most of the energy at each trophic level is passed on to the next trophic level.

• D. The energy available remains the same as matter passes through different trophic levels.

Tags

NGSS.MS-LS2-3

This image shows an energy pyramid in an ocean ecosystem. Which statements about energy use are true and which are false?

Groups:

(a) True

,

(b) False

• Herring use energy from phytoplankton to produce food

• Sharks use energy to produce food

• Zooplankton use energy for growth

• Phytoplankton use energy for growth

• Phytoplankton use energy to produce food

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Identify the organisms as producers, primary consumers, secondary consumers, tertiary consumers.

a

b

c

d

Secondary Consumer

Producer

Tertiary Consumer

Primary Consumer

Tags

NGSS.MS-LS2-2

Label the tropic levels in the energy pyramid.

​ ​ ​ ​

a

b

c

d

Primary Consumers

Tertiary Consumers

Peaks

Producers

Secondary Consumers

Points

Tags

NGSS.MS-LS2-3

The arrows in a food chain or web represents what?

• They point to the organism that is being eaten.

• It shows how sunlight flows within an ecosystem.

• They show the direction the energy is flowing between organisms.

• They represent how water is transferred within a habitat.

Tags

NGSS.MS-LS2-3

In this food chain, what will happen if the frogs become extinct?

• The snakes will increase.
• The grasshoppers will decrease.
• The eagles will remain the same.
• The grasshoppers will increase.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4