Ecosystems & Food Chains

Some students set up an aquarium containing water, fish, and plants.

Plants help support the survival of fish because they —

• remove nutrients from the soil.

• use the energy of sunlight.

• absorb water from their surroundings.

• add needed resources to the water.

Some plants grow best in damp environments. During a severe drought, these plants will most likely —

• perish

• move

• grow

• thrive

Tags

CCSS.RI.3.3

CCSS.RI.4.3

CCSS.RI.5.3

CCSS.RI.6.3

CCSS.RI.7.3

When a hurricane comes ashore, it brings large amounts of salt water with it. How might this affect the organisms in fresh water environments?

• The plants in the fresh water will move to a new location.

• The number of organisms in the environment will increase.

• Animals in this environment will begin to grow much larger.

• Organisms that cannot survive in salty water will not survive.

Tags

CCSS.RI.3.3

CCSS.RI.4.3

CCSS.RI.5.3

CCSS.RI.6.3

CCSS.RI.7.3

The table shows the basic needs of a robin. Which environmental change would be harmful to the survival of a robin?

• Prairie dogs digging tunnels in the ground.

• Beavers building dams across streams.

• Humans clearing forests to build houses.

• Ants building large anthills in a schoolyard.

How might cutting down the trees in a forest environment affect the animals that live there?

• All of the animals in the forest will perish in a short period of time.

• Animals that cannot find what they need, will move.

• The animals will move underground to find what they need.

• Most animals will eat different kinds of food in order to survive.

Tags

CCSS.RI.3.3

CCSS.RI.4.3

CCSS.RI.5.3

CCSS.RI.6.3

CCSS.RI.7.3

What is the original source of energy for all organisms in a pond ecosystem?

• water

• plants

• animals

• sun

Which food chain shows the correct flow of energy through a prairie ecosystem?

• A

• B

• C

• D

The arrows in the diagram represent -

• an increase in size

• the flow of energy

• how they move

• decreasing temperature

A disease is causing plants not to grow in this habitat. How will this affect the food chain? The number of –

• large fish will increase.

• small fish will increase.

• small fish will decrease.

• sunlight will increase.

This graph shows the population of coral reef fish in a certain area over several years.

What is the best explanation for what is happening to the population of coral reef fish in this area?

• The fish have more shelter from predators.

• There are more predators in the ecosystem.

• The food supply of the fish has increased.

• The amount of sunlight is increasing.