Ecosystems

Which type of animal usually eats both producers and consumers?

• omnivore

• carnivore

• herbivore

• predator

Tags

NGSS.MS-LS2-3

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

Which classification best describes herbivores?

• producers

• consumers

• predators

• decomposers

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

• The spread of disease

• The availability of water

• The quality of soil

• The distribution of organisms

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

NGSS.MS-LS2-5

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 a producer, because it makes its 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-LS2-2

NGSS.MS-LS2-3

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

• An increase in the number of producers

• A decrease in the types of decomposers

• An increase in the types of plants

• An increase in the number of carnivores

Tags

NGSS.MS-LS2-4

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

• Consumer

• Decomposer

• Herbivore

• Producer

Tags

NGSS.MS-LS2-3

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 plants provide them with energy

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What would most likely happen if all of 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 predators

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

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-LS2-4