Ecosystem Test

Which best compares lakes and oceans?

• Both are large bodies of fresh-water

• Both are large bodies of salt-water

• Only lakes include fish

• Only oceans include corals

An organism gets nutrients it needs by braking down dead leaves. What is the niche of that organism?

• Producer

• Decomposer

• Herbivore

• Consumer

Which is a living part of both a grassland and a forest ecosystem?

• Soil

• Pine tree

• Shrub

• Rocks

Which best describes an ecosystem?

• All the living and nonliving things in an area

• All the organisms of the same kind in an area

• A large area, such as a forest

• A place where many organisms live

Which best describes one way that energy is transferred in a food chain?

• From one producer to another consumer

• From a consumer to a producer

• From a producer to a consumer

• From a producer to the sun

Eelgrass is a major source of food for birds and turtles in an estuary. What will most likely happen to the bird and turtle populations if people remove the eelgrass to build a bridge?

• The turtle population will increase, but the bird population will decrease

• Both bird and turtle population will increase

• The bird population will increase, but the turtle population will decrease

• Both the bird and turtle population will decrease

How do bacteria most likely affect birch trees in a forest?

• Bacteria add nutrients to soil that birch trees need

• Bacteria help birch trees reproduce by spreading pollen

• Bacteria provide energy that birch trees need

• Bacteria help birch trees reproduce by spreading seeds

Which organism is the best example of a consumer?

• Algae

• Fungus

• Raccoon

• Pine Tree

Which organism most likely lives in a grassland ecosystem?

• Trout

• Bison

• Bear

• Crab

In a lake ecosystem, how would people catching too many minnows most likely affect the minnows' predators?

• The predators would lose much of their food source

• The predators would move to a new lake

• The predators would not be affected

• The predators would reproduce more