Food Webs and Chains

The first law of thermodynamics states

• energy cannot be created or destroyed

• when energy changes forms some is degraded to low-quality energy

• represents the dry weight of organisms at each trophic level

• shows the number of organisms at each trophic level

The second law of thermodynamics states

• energy cannot be created or destroyed

• when energy changes forms some is degraded to low-quality energy

• represents the dry weight of organisms at each trophic level

• shows the number of organisms at each trophic level

Tags

NGSS.HS-PS3-4

Why are there so few top predators present in any ecosystem?

• Because there is too much energy in the system

• Because there is not enough energy remaining in the ecosystem

• Because they do not need energy

• Because all predators are solitary animals

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

How are detritivores and decomposers different?

• decomposers break down dead, organic materials while detritivores eat dead organisms and wastes

• detritivores break down dead, organic materials while decomposers eat dead organisms and wastes

• There isn't a difference between detritivores and decomposers

• decomposers come before detritivores

Tags

NGSS.MS-LS2-3

List the trophic levels from lowest to highest

• Tertiary consumer, secondary consumer, primary consumer, primary producer

• Secondary consumer, tertiary consumer, primary consumer, primary producer

• Primary producer, primary consumer, secondary consumer, tertiary consumer

• Primary producer, tertiary consumer, secondary consumer, primary consumer

Tags

NGSS.MS-LS2-3

A fourth consumer level is known as the

• Primary Consumer

• Secondary Consumer

• Tertiary Consumer

• Quaternary Consumer

Which is NOT a producer?

• Carrots

• Grains

• Grasshopper

• Grasses

Tags

NGSS.MS-LS1-6

Based on the diagram who would be a primary consumer?

• Rabbit

• Owl

• Fox

• Grass

Based on the diagram who is NOT a secondary consumer?

• Mice

• Bird

• Owl

• Fox

Tags

NGSS.MS-LS2-2

Based on the diagram who would be a tertiary consumer?

• Rabbit

• Grasshopper

• Fox

• Owl

Tags

NGSS.MS-LS2-3