Science Unit 4 Test Review: Ecosystems & Interactions

Bridget is studying a pond ecosystem near her house. What living things might she expect to find in the pond ecosystem?

• birds, seaweed, fish

• fish, trees, rocks

• frogs, water, insects

• lily pads, insects, fish

A food chain, like this one, shows how energy moves between living things. Which living thing best completes the partial food chain above?

• a bird

• grass

• the sun

• a predator

Which change will most likely have the greatest effect on an ecosystem?

• A tree is cut down.

• A fire burns down a forest.

• A piece of trash is thrown into a pond.

• There is no rain for a week in a desert.

A farmer grows corn in a field. The farmer feeds the corn to his chickens. What do the chickens get from the corn?

• energy

• illness

• oxygen

• water

Which ecosystem gets a lot of rain and is very warm and humid?

• desert

• grassland

• salt water

• tropical rainforest

This picture shows a food chain that can be found in a prairie. If the snake population increased, which other populations would most likely increase?

• frog and plant populations

• hawk and cricket populations

• hawk and plant populations

• frog and cricket populations

Living and nonliving things are shown in this desert ecosystem. Which is a way the animals and plants in this ecosystem interact with each other?

• A lizard sits on a rock.

• A snake warms itself in the sun.

• An owl finds shelter in a cactus.

• A cactus stores water in its stem.

A bear eats berries and nuts, but also eats fish. Which best describes a bear?

• herbivore

• carnivore

• omnivore

• producer

This picture shows a forest food chain. What is the role of the jackrabbit in this food chain?

• Producer

• Primary Consumer

• Secondary Consumer

• Decomposer

The students in Mr. Remsen’s class investigated an aquatic ecosystem. They looked at a square of pond water and counted the living and nonliving things inside it. How might their findings for the aquatic ecosystem compare to their findings for a schoolyard ecosystem?

• The aquatic ecosystem has more water-based organisms.

• The schoolyard ecosystem has more land-based organisms.

• Both ecosystems have the same types of organisms.

• The aquatic ecosystem has fewer organisms than the schoolyard.

Tags

CCSS.7.SP.A.2

CCSS.7.SP.B.4