Changes to Food Webs

A new neighborhood is being built by Green Valley Elementary. The construction crew cleared the land and the rabbits have lost their habitat. What prediction can we make about how this change will affect the food web?

• A. An increase in plant growth will occur.

• B. The wolf population will decrease because they no longer have a food source.

• C. Both A and B are correct.

• D. No change will occur.

Tags

NGSS.MS-LS2-1

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Pesticides have been applied to the grass. It has seeped into the pond water and killed the algae. What prediction can you make about how this will affect the food web?

• There will be a decrease in the bluegill population.

• The minnow will have no food for an energy source and there will be a decrease in the minnow population.

• There will be an increase in the crayfish population.

• There will be no change to the ecosystem.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

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A large amount of crabs are being trapped and sold to grocery stores for food. What prediction can you make about how this will have an affect on the ecosystem?

• The spotted seatrout will decrease in number and as a result the dolphin will look for more pinfish to eat.

• The toadfish will not have a food source and will decrease in number.

• The number of sea urchins will increase in number.

• All are correct.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

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According to the diagram, frogs get energy from which organism?

• Frogs get energy from the owl.

• Frogs get energy from the grasshopper.

• Frogs get energy from the grass.

• Frogs get energy from the Sun.

Tags

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Which of these gives energy to Algae?

• Sun

• Clams

• Fish

• Algae makes its own energy.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

What prediction can you make if there were fewer toads?

• There would be less grass but more more cranes.

• There would be more grass but less grasshoppers.

• There would be more grasshoppers and caterpillars and less cranes.

• There would be fewer grasshoppers and cranes but more caterpillars.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4