Unit 4 Energy and Ecosystems

Which statement is true about a community?

• A community is all the same species living in different ecosystems.
• A community is made up of one of a kind of population living in one place.
• A community is made up of different populations that depend on one another.
• A community is made up of different populations that do not interact with one another. 

People are part of food chains. What is the role of people in a food chain?

• Carnivore
• Consumer
• Herbivore
• Producer

Devin's family is building a house. His parents want to use a renewable energy source to provide energy for the house. Which of the following could they use?

• Coal
• Natural Gas
• Oil
• Solar Energy

Which of the following activities can cause pollution?

• mining fossil fuels
• conserving water
• picking up trash
• planting trees

Which of the following is an example of conservation? 

• Leaving the lights on 
• Brushing your teeth with the water running
• Leaving the refrigerator door open
• turning lights off when you exit a room

This picture shows the life cycle of a frog. How does a frog's niche change when it is fully grown?

• The frog uses legs to move and live on land.
• The frog uses a tail to move and live on land. 
• The frog uses legs to swim and live in water.
• The frog uses a tail to swim and live in water. 

In a swamp, archerfish live among the mangrove tree roots. In or near the water, heron feed on fish, frogs, and insects. Which term describes each group of living things?

• community
• ecosystem
• niche
• population

Ecosystems have producers, consumers, and decomposers. Why are producers important in an ecosystem?

• They produce food for consumers.
• They break down remains of dead plants.
• They produce food for other producers.
• They consume food for other consumers.

People's actions can change an ecosystem. Which of the following changes is helpful to an ecosystem?

• letting large herds of animals graze on farmland.
• introducing nonnative plants into an area.
• setting aside land areas as animal refuges.
• clearing forests to make lumber. 

This picture shows a food chain. What organism starts the food chain. 

• carnivore
• consumer
• herbivore
• producer