Ecosystem Levels

The ultimate source of energy for most ecosystems is

• carbon
• oxygen
• sunlight
• water

Organisms that directly use energy from the sun to make their own food are called

• autotrophs
• heterotrophs
• carnivores
• decomposers

Tags

NGSS.MS-LS1-6

Which of the following illustrates the correct ordering of trophic levels?

• decomposers-carnivores-autotrophs-herbivores
• herbivores-autotrophs-carnivores-decomposers
• autotrophs-herbivores-carnivores-decomposers
• carnivores-producers-omnivores

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

Within an ecosystem:

• Energy flows in one direction only and nutrient are recycled.
• energy is recycled and nutrients flow in on direction
• energy flows in one direction only
• energy and nutrients are both recycled

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

The efficiency of energy transfer from a lower trophic level to the next highest level is roughly

• 1%
• 10%
• 100%
• 1000%

In aquatic ecosystems, biomass is least at which trophic level?

• autotrophs
• herbivores
• carnivores

You are in an area where there are squid, seals, and penguins. You are most likely in which ecosystem?

• deciduous forest
• hot desert
• Antarctic Ocean shore
• grassland

You find yourself in an area where there are snakes, hawks, and coyotes. Based upon these animal populations, you are most likely in which ecosystem?

• deciduous forest
• hot desert
• grassland
• tropical forest

You are in an area where the ground is littered with what appears to be dry, dead leaves. You are most likely in which ecosystem?

• deciduous forest
• hot desert
• grassland
• tropical forest

This zone has the greatest concentration of plankton in a freshwater lake?

• profundal
• littoral
• limetic
• bottom