Energy Flow

Which species in this food web has the widest variety of food they eat?

• oak tree

• wolf

• hawk

• racoon

Answer explanation

Look at the amount of arrows going to the hawk - it has four - that means it has the widest variety of food that it can eat, which is very helpful for an animal.

Tags

NGSS.MS-LS2-2

Which animal in this food web is both a primary and secondary consumer

• Fox

• Owl

• Grasshopper

• Bird

Answer explanation

Look at the arrows - the bird has one arrow going directly to it, from the poducer, but also has two arrows between it and the producer

Tags

NGSS.MS-LS2-3

Draw the flow of energy in a food web

Tags

NGSS.MS-LS1-7

NGSS.MS-LS2-3

What is the reasoning behind the lack of energy being transferred from one trophic level to the next?

• Actually 90% is passed from one trophic level to the next

• Energy is lost as heat, and through the body doing daily activities

• Energy is lost due to the plants absorbing photons from the sun

• Not all animals have the same appetitie so energy escapes

Tags

NGSS.MS-LS2-3

If a disease caused the grain to be destroyed and no longer exist which animal would not be impacted?

• Bird

• Grasshopper

• Mouse

• Rabbit

Answer explanation

The rabbit is the only animal that doesn't eat the grain, all of the others listed eat grain as a food source.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

If the one-celled life has 50,000 kj of enrgy then how much energy would be transferred toward the shark?

• 50,000 kj

• 5,000 kj

• 50 kj

• .5 kj

• 0 kj

Answer explanation

The shark is in the 6th trophic level, move the decimal point five places to the left.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which organism is recieving energy from each trophic level?

• Snake

• Grasshopper

• Sun

• Bacteria & Fungi

Answer explanation

Look at the arrows, the decomposers gain energy from dead oganisims.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

For this pyramid of numbers what observations can be made.

• The producers are lowest in number because they are small

• The producers are the most numerous in this ecosystem

• The apex predator ( the bear ) has the same population of the primary consumers

• All of the above are true

Answer explanation

Looking at the diagram the we see the largest space of this pyramid is occupied by the producers, typically they are the backbone to any healthy ecosystem.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4