Food Web and Food Chain Quiz

Within a food web, there are usually many different food chains. A particular organism may be part of many different food chains. This global food web includes elements from a meadow ecosystem that interacts with a marsh ecosystem. Which of these is a food chain that is part of the global food web?

• meadow grass → rabbit → fox → hawk

• marsh grass → snail → small fish → hawk

• marsh grass → grasshopper → mouse → fox

• meadow grass → grasshopper → praying mantis → small fish

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According to the food web, which organism is a producer in the mangrove swamp?

• crab

• mold

• pelican

• phytoplankton

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This relationship between the butterflies and milkweed is an example of which of the following?

• Commensalism

• Mutualism

• Parasitism

• Predation

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A food chain provides details about the food relationships among organisms in an ecosystem. This food chain shows some of the plants and animals that could be observed in a meadow ecosystem. What is the source of energy for the snake?

• the toad

• the owl

• sunlight

• green plants

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Remoras are small fish that attach to sharks but do not harm them. When sharks tear prey apart, remoras eat the leftovers. What relationship do remoras have with sharks?

• mutualism

• parasitism

• commensalism

• predator-prey

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Honeybees are important pollinators of flowers. Mites that live in the bodies of bees can attack honeybee colonies. Some birds, amphibians, and insects eat honeybees. Which of the following relationships is not included in the description above?

• parasitism

• mutualism

• commensalism

• predator-prey

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NGSS.MS-LS2-2

The graph below shows the populations of wolves and rabbits in a forest.

Which inference could explain the decrease in the rabbit population from 1995 to 2000?

• An increase in the wolf population caused a decrease in the rabbit population due to predation.

• A decrease in the wolf population caused a decrease in the rabbit population due to predation.

• Both wolves and rabbits depend on the same natural resources, which became scarce after 1995.

• A limiting factor other than wolf predation caused a decrease in the rabbit population after 1995.

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Which inference could explain the decrease in the rabbit population from 1995 to 2000?

• An increase in the wolf population caused a decrease in the rabbit population due to predation.

• A decrease in the wolf population caused a decrease in the rabbit population due to predation.

• Both wolves and rabbits depend on the same natural resources, which became scarce after 1995.

• A limiting factor other than wolf predation caused a decrease in the rabbit population after 1995.

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NGSS.MS-LS2-4

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In all areas of the world, groundwater is an important source of drinking water. However, in many areas, the groundwater is being polluted, mainly by nitrates. Sometimes the groundwater is so polluted, it is no longer able to be used as drinking water. What is the most likely source of the nitrate pollutants?

• Too many weeds growing near bodies of water

• Use of fertilizers by farmers and homeowners

• Litter in the form of plastic bottles and aluminum cans

• The abundance of apartment complexes in urban areas

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NGSS.MS-LS2-1

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Dams are barriers that prevent the flow of water. They are created to provide flood control, recreational areas, water for irrigation, and hydroelectric power. Although dams serve many important purposes, they can also have a negative impact on the environment by

• Increasing fresh water sources for humans.

• Preventing fish from moving along a river.

• Serving as a place for people to have picnics.

• Providing new wildlife habitat

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