Interdependence in Nature

Which of these facts best describes how these birds depend on other animals to survive?

• Fact 1

• Fact 2

• Fact 3

• Fact 4

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NGSS.MS-LS2-1

Tiny organisms called Daphnia live in lakes and ponds where they consume algae. A lake with a stable population of algae and Daphnia was contaminated by pollution, resulting in the death of many algae. Which graph shows the most likely trend in the Daphnia population in the lake shortly before and after the pollution event?

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

Look at the food web. What might happen if all the rabbits died?

• There would be more hawks because there are less rabbits in competition with them.

• There would be fewer lizards because the hawks would eat more of them.

• There would be less grass because it would be eaten by the grasshoppers.

• There would be more snakes because they would not be in competition with the rabbits.

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I am at the level after the producers in the food chain. I eat plants to get energy. Who am I ?

• Carnivores (secondary consumers)

• Herbivores ( primary consumers)

The arrows in a food chain show:

• the flow of energy

• the loss of energy

• how animals use energy to move around in a habitat

• how plants make their own energy.

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NGSS.MS-LS2-3

What would best explain the decrease in primary producers?

• an increase in solar energy

• a decrease in O2 levels in the H2O

• a decrease in the population of tertiary consumers

• an decrease in the population of primary consumers

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NGSS.MS-LS2-1

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The sequence of who eats whom in the environment.

• Balance in nature

• Food chain

• Cycle chain

• Decomposers

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which of these would probably be placed at the top of the starting point in a food web

• a snake or an eagle

• a rat or a cat

• human beings

• grass or grains

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NGSS.MS-LS2-3

A complex interconnectedness that shows how energy flows in nature

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NGSS.MS-LS2-3

What do you understand by interdependence of plants and animals?

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