Ecosystem

In a food web, each ____________ depends on the trophic level below it for energy.

• consumer

• producer

• decomposer

• detritivore

Tags

NGSS.MS-LS2-3

A species of rabbit lives in a meadow where grass plants are readily available during summer months. The rabbits do not stray far from the meadow because the plants supply food and protection from predators. One summer, a fire destroys the plants in the meadow. As a result of the absence of plants in the meadow, the rabbit population will probably...

• decrease in size

• increase in size

• increase reproduction

• switch to a different type of food

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What happens to the amount of available energy in the pyramid as it moves up through the different levels?

• it increases

• it decreases

• it remains the same

• it decreases, then increases

Tags

NGSS.MS-PS3-2

In any food web, the organisms that are responsible for converting raw energy into usable chemical energy are collectively called ________ while organisms that recycle the nutrients trapped in dead organisms are collectively called ________.

• producers;consumers

• producers; decomposers

• heterotrophs; consumers

• heterotrophs;autotrophs

Tags

NGSS.5-LS2-1

Autotrophs are the same as producers.

• True

• False

All of the factors listed are abiotic factors of this underwater ecosystem EXCEPT the

• sunlight

• water currents

• fish population

• water temperature

Tags

NGSS.MS-LS2-3

In an ecosystem, a fungus, such as the mushroom pictured here, functions as a

• autotroph

• heterotroph

• decomposer

• predator

Tags

NGSS.5-LS2-1

Look at the diagram of the food web. The arrows means “eaten by.”

What will happen if the number of snakes goes down?

• The owl will eat the grass

• The number of frogs will go down

• The hawk and owl will have less food

• The number of mice and grasshoppers will go up.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The transfer of energy from one organism to the next in an ecosystem begins with a producer. A producer is an organism that produces its own food. A consumer is an organism in a food chain that obtains energy from producers or other consumers; consumers may be herbivores or carnivores.

Which food chain correctly describes the flow of energy in an ecosystem?

• grass → grasshopper → fish → human

• grasshopper → fish → human

• human → fish → grasshopper

• human → grasshopper → fish → grass

Tags

NGSS.MS-LS2-3

Which organisms would be the energy for the hawk?

• rabbit, shrew, and snake

• rabbit, snake, and grasshopper

• shrew, snake, and insect eating bird

• grass, rabbit, and insect eating bird

Tags

NGSS.MS-LS2-3