Ecosystems & Food Chains Post Assessments SS

These data tables give information on four habitats and the needs of a Fennec fox.

Which habitat most closely meets the needs of the fennec fox?

• Q

• R

• S

• T

Frogs often live in freshwater ponds where they feed on insects and lay their eggs in the water. Sometimes they are eaten by snakes. Frog would leave the area if -

• there were more insects.

• the snakes all died out.

• the water in the pond dried up.

• there was a little more rain.

All of the following are changes to an environment that could help an animal thrive EXCEPT

• more of the kind of plants the animal eats.

• fewer predators that eat the animal.

• less rain during the spring and summer

• removal of animals that eat the same food.

How could a forest fire help some organisms? A forest fire could help –

• remove the trees that birds use to build nests.

• clear dead plant to allow new plant to grow.

• scare away small mammals that are food for wolves.

• burn the organic matter from soil where worms live.

The chart below shows population changes after a recent flood.

The information in this table shows that floods –

• are harmful to all species living in the habitat.

• cause changes that help some species thrive.

• result in large temperature changes.

• make populations of most species increase.

Which of the following is represented in the diagram above?

• Evaporation of water

• Transfer of energy

• Reflection of light

• Animal life cycle

What is most likely the first thing to result from having fewer field mice in the food chain pictured here?

• The snakes would have to find another food source

• The plants that make seeds would decrease in number.

• The eagles would have to fly away to a location.

• The mice would eat many more kinds of seeds.

A new fish that also eats plants is introduced into a pond. What changes would occur to this pond ecosystem?

• The large fish population will decrease.

• The plant population will decrease.

• The small fish population will increase.

• The new fish population will decrease.

Which of the following correctly shows how energy moves through a food chain?

• Sun → meat eaters → plants → plant eaters

• Sun → plants → plant eaters → meat eaters

• Sun → plant eaters → meat eaters → plants

• Sun → plants → meat eaters → plant eaters

Based on the food chain illustrated above, what effect would be the most likely direct result of increasing the number of fish?

• Beetles would have trouble finding food.

• There would be more kinds of plants.

• The population of beetles would decrease.

• Plants would no longer survive in this habitat.