3-4 Ecosystem Energy and Structure Quiz

What is one of the objectives of studying energy in the ecosystem?

• To understand the movement of water through an ecosystem.

• To investigate the movement of energy through an ecosystem.

• To study the migration patterns of animals.

• To analyze the growth of plants in different climates.

What is an ecological pyramid?

• A structure showing the distribution of water in an ecosystem.

• A diagram representing the flow of energy through different levels of an ecosystem.

• A chart showing the migration of birds.

• A graph depicting the growth rate of plants.

What is biological magnification?

• The increase in the concentration of pollutants in organisms as you move up the food chain.

• The process of organisms growing larger over time.

• The spread of diseases in an ecosystem.

• The increase in biodiversity in an ecosystem.

What makes a more stable ecosystem?

• High biodiversity.

• Low biodiversity.

• High pollution levels.

• Low nutrient availability.

What happens to some of the energy from the sun when it reaches Earth?

• It is completely absorbed by plants

• It is all reflected back into space

• Some is reflected back into space, and some is absorbed by Earth's surface and atmosphere

• It is used entirely for photosynthesis

What percentage of the sun's energy that reaches Earth is received by plants?

• Less than 1%

• 10%

• 50%

• 100%

What percentage of the energy received by plants is stored as organic matter during photosynthesis?

• Less than 10%

• Less than 20%

• Less than 30%

• Less than 50%

How much organic matter do plants produce with the energy they receive from the sun?

• 100 billion tons

• 150 billion tons

• 170 billion tons

• 200 billion tons

What happens to some of the heat from the Sun when it reaches Earth?

• All heat is absorbed by Earth's surface.

• Some heat is reflected back into outer space.

• All heat is absorbed by the atmosphere.

• No heat is absorbed by the atmosphere.

What role does Earth's atmosphere play in the interaction with sunlight?

• It absorbs all the sunlight.

• It reflects all the sunlight.

• It absorbs some of the heat from the Sun.

• It has no effect on sunlight.