Ecosystem

Organisms from which niche contain the greatest amount energy?

• primary consumers

• decomposers

• producers

• secondary consumers

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

The arrows indicate the direction of the flow of

• carbon dioxide

• energy

• oxygen

• water

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Jim found a chart that showed information on ecosystems. He noticed that the chart was subdivided into producers, primary consumers, secondary consumers, and tertiary consumers. Which statement best describes the energy relationship found within this ecosystem chart?

• Plants produce the most energy for feeding the organisms in the ecosystem.

• Producers generate less energy than consumers in the ecosystem.

• Tertiary consumers such as snakes consume most of the energy available in the ecosystem.

• The insect population has less energy available to it than the frog population in the ecosystem.

Tags

NGSS.MS-LS2-3

Biotic components need to be recycled through an ecosystem. Which type of organisms are best able to recycle nutrients back into the ecosystem?

• scavengers

• producers

• decomposers

• predators

Tags

NGSS.MS-LS2-3

Which organism gets its energy directly from the sun?

• photoplankton

• krill

• fish

• sea urchin

Tags

NGSS.MS-LS1-6

In a food chain, energy is passed from one organism to another. Four organisms from a food chain is listed: mouse, owl, snake, wheat. Which order would be correct by the amount of energy available for the next level, greatest to the least?

• mouse, wheat, owl, snake

• owl, snake,mouse, wheat

• wheat, owl, snake,mouse

• wheat, mouse, snake, owl

Tags

NGSS.MS-LS2-3

The plant gets its energy it needs from the sun. The plant uses about 10% of the energy to perform life functions. The plant transfers about 10% of the energy to the consumers in a food chain. Most of the remaining energy is

• Is released in the ecosystem as heat.

• stored in the soil for later use.

• reabsorbed by the sun.

• recycled by decomposers.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

The energy pyramid shows relationships among an ecosystem. When one organism consumes another one, the molecules in the food are converted while energy is transferred. The different positions that identify an organism's place in an ecosystem as shown are

• tropic levels

• food chains

• niche sites

• energy sources

Tags

NGSS.MS-LS2-3

A population of deer recently increased in size. Which most likely could have caused the deer population to increase?

• a disease was spreading

• Their habitat was destroyed.

• Food sources were hard to find.

• Their predators were disappearing.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Decomposers are organisms that eat and break down dead plant and animal material. Which organism is a decomposer?

• algae

• moss

• bacteria

• fish

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3