Food Web Removal or Addition of Organisms

Which group is not represented in the food web?

• producers

• primary consumers

• secondary consumers

• decomposers

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

What do the arrows in the food chain indicate about the flow of energy in an ecosystem?

• Energy is continuously recycled by the organisms in an ecosystem.

• Energy flows in one direction in an ecosystem, from producers to consumers.

• More of the available energy in an ecosystem is given to large animals than to small animals.

• Organisms at the end of the food chain receive more energy than those at the beginning.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

In this energy pyramid, which organism would most likely be in level 2?

• bird

• fox

• caterpillar

• tree

Tags

NGSS.MS-LS2-3

Which one of the following is true of grass in an ecosystem?

• It converts oxygen to glucose.

• It produces carbon dioxide from oxygen and water.

• It produces glucose from carbon dioxide and water.

• It converts water to energy.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

How would the removal of earthworms from the food chain affect the other organisms?

• The number of bass will increase.

• The number of crayfish will decrease.

• The crayfish will get their energy directly from the sun.

• The number of bass and ospreys (bird) will increase.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Interactions in an ecosystem result from the transfer of matter and energy from producers to consumers and eventually decomposers. What are the forms of energy transfer from numbers 1 through 4?

• Chemical energy to chemical energy

• Light energy to chemical energy

• Chemical energy to heat energy

• Heat energy to mechanical energy

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

The diagram shows part of an aquatic food web for a stable lake ecosystem in Connecticut. What is the source of energy for the algae?

• waves

• sunlight

• bacteria

• rotifers, water fleas and tadpoles

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Suppose that a new predator of the rabbit migrated to this ecosystem. What is the most likely initial effect on the other organisms?

• More competition among the mice for food

• More competition among the hawks for food

• Less competition among snakes for food

• Less grass available for food

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

For the food chain shown, which of the following changes would have the most severe consequences?

• a drastic decrease in rainfall, causing a drought

• the poaching of predatory hawks by game hunters

• the introduction of a second predator that eats field mice

• a parasitic infestation that reduces the cricket population

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

The diagram provided shows a marine food chain. In this food chain, the zooplankton are

• primary producers.

• primary consumers.

• secondary consumers.

• tertiary consumers.

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3