Life Science

What will be the most affected if the decomposers in an ecosystem are removed?

• spread of disease

• availability of water

• quality of the soil

• distribution of organisms

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NGSS.MS-LS2-1

NGSS.MS-LS2-3

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A mouse eats seeds and insects. Which best describes the role of the mouse?

• consumer

• decomposer

• herbivore

• producer

Tags

NGSS.MS-LS2-2

Which would most likely cause a decrease in a population of herbivores?

• an increase in producers

• a decrease in decomposers

• an increase in plants

• an increase in carnivores

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which type of animal usually eats both producers and consumers?

• omnivores

• carnivores

• herbivores

• predator

Tags

NGSS.MS-LS2-2

Which classification best describes herbivores?

• producers

• consumers

• predators

• decomposers

This is a food chain that includes grass, a grasshopper, and a bird. (grass --> grasshopper --> bird). How is the grass in this food chain best described?

• It is producer, because it makes it own food

• It is a producer, because it is eaten by consumers.

• It is a consumer, because it gets energy from producers

• It is a decomposer, because it breaks down sunlight.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What would most likely happen if all the decomposers in an ecosystem were removed?

• The animals in the ecosystem would die because of the spread of disease

• The plants in the ecosystem would eventually die because of a lack of nutrients in the soil

• The plants in the ecosystem would begin to die out because of a decrease in available water

• The animals in the ecosystem would eat other types of food because of a decrease in producers

Tags

NGSS.MS-LS2-1

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A food chain in an ecosystem includes blackberry bushes, deer, and wolves. (Deer eat blackberries, wolves eat deer). If the population of wolves decreases, how will this affect the population of blackberry bushes?

• It will decrease because there will be fewer deer

• It will increase because there will be fewer deer

• It will decrease because there will be more deer

• It will increase because there will be more deer.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which has the greatest effect on the amount of salt in a salt marsh?

• the number of animals living in the marsh

• the closeness of the marsh to the ocean

• the depth of the water in the marsh

• the temperature of the water in the marsh

Tags

NGSS.MS-LS2-4

What would most likely result if all plants in an area were destroyed?

• Consumer populations would increase because more sunlight would reach the ground

• Decomposer populations would increase because more sunlight would reach the ground

• Consumer populations would decrease because plants provide them with water

• Consumer populations would decrease because pants provide them with energy

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4