Ecosystems

Which kind of ecosystem is a combination of salt water and freshwater?

• an estuary

• an ocean

• a lake

• a pond

Some birds collect berries of plants in one area and carry them to another area to eat, dropping some. As a result, new plants with berries grow in the new areas. What can be concluded from this example?

• Birds harm plants by carrying away berries.

• Birds prevent the spread of plants in a new area.

• Some plant diseases are caused by birds removing berries from plants.

• Some plants increase the areas where they grow with the help of birds.

Tags

NGSS.MS-LS2-2

How are deer and wolves classified?

• as decomposers

• as consumers

• as carnivores

• as producers

A food chain is shown.

plant -> grasshopper -> bird -> snake -> owl

What will most likely occur if there is a decrease in the bird population?

• The owl population will increase.

• The snake population will increase

• The plant population will decrease.

• The grasshopper population will decrease.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-2

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which can be found in both a grassland and a deciduous forest?

• abundant amounts of rain

• a small variety of animals

• small shrubs

• tall trees

Which is an example of a consumer eating another consumer in an ocean ecosystem?

• a fish eating algae

• a shark eating a tuna

• a sea turtle eating sea grass

• a sea worm eating dead animals

Tags

NGSS.MS-LS2-2

How are salt marshes and estuaries similar?

• Both contain only salty ocean water.

• Both are affected by fast-moving water.

• Both are affected by high and low tides.

• Both contain only freshwater from rivers.

A student observes a small pond and notices green algae on the rocks. What is the role of algae in the pond ecosystem?

• producer

• consumer

• omnivore

• decomposer

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

In a food chain, foxes consume rabbits and mice. If the mouse population suddenly decreases but the rabbit population stays the same, what could happen to the number of foxes?

• The number of foxes could decrease because they will eat fewer rabbits.

• The number of foxes could increase because they will only have rabbits to eat.

• The number of foxes could increase because they will compete less for available food.

• The number of foxes could decrease because they will compete more for available food.

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-1

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Which organism is a producer?

• pine tree

• earthworm

• mushroom

• hawk

Tags

NGSS.MS-LS2-3