GR 5 Unit 1 Ecosystem Review

All the living and nonliving things that interact in an area make up a(n) ______.

• ecosystem

• organism

• nutrient

• environment

What is the order of the four layers in a tropical rainforest, from bottom to top?

Tiny plantlike organisms called ______ are food for many pond animals.

• algae

• cattails

• tadpoles

• water lilies

All animals that live in a pond ecosystem need ______.

• sunlight

• soil

• gills

• air

Scientists that study ecosystems and teach other people about them are called ______.

• chemists

• botanists

• ecologists

• economists

The photo below shows a coral reef ecosystem. Which components of this ecosystem interact?

• The two big yellow fish because only living organisms can interact in ecosystems.

• The coral growing on the reef and the water around them because water is the most important part of all ecosystems.

• The organisms and the sunlight that shines through the water because all ecosystems need sunlight in order to survive.

• All the organisms, coral, sand, and water because ecosystems are made up of all living and nonliving things inside them.

Compare the ecosystems shown in the two photos. Notice that one has many more plants than the other. What is the most likely cause of this difference?

• differences in the water quality

• differences in the organisms present

• differences in temperature, sunlight, and soil

• differences in how plants carry out photosynthesis

Scientists are studying a pond ecosystem. Using this food chain model, predict what would happen to the turtles following a loss of algae?

• The turtles will decrease because they eat herons.

• The turtles will increase because they depend on the dying fish population.

• The turtles will decrease because they depend on the dying fish population.

• The turtles will increase because they depend on the dying heron population.

The image of a pea plant system shows its stem and roots. What function do both the stem and the roots have?

• holding up the leaves of the plant

• taking in water and nutrients from the soil

• using chlorophyll to capture light to make food

• providing support to keep the plant from falling over

Eduardo looks at a bee visiting his garden in the backyard. In what way does the bee help in a plant’s life cycle?

• The bee eats pollen on the flowers.

• The bee helps the wind spread pollen.

• The bee helps the fruit spread its seeds.

• The bee spreads pollen between flowers.