Human Impact on the Americas - End of Unit Assessment

What is the primary source of energy for animals' food?

• The soil

• The water

• The sun

• The air

What do plants mainly use for their growth?

• Sunlight and soil

• Nutrients from decomposers

• Soil and water

• Air and water

Which of the following is NOT a component of an ecosystem?

• Rocks

• Decomposers

• Animals

• Plants

What role do decomposers play in an ecosystem?

• They consume plants

• They break down dead organisms

• They produce food

• They provide shelter

What is an example of a model that can describe energy in animals' food?

• A diagram

• A story

• A song

• A poem

What do animals need food for?

• To create soil

• To make water

• To produce oxygen

• Body repair and growth

What is a healthy ecosystem?

• One with only animals

• One with only plants

• One where multiple species meet their needs

• One with no decomposers

What happens to matter in an ecosystem?

• It cycles between air, soil, and organisms

• It disappears

• It stays in one place

• It only moves in water

What do organisms release back into the environment?

• Gases, liquids, and solids

• Only liquids

• Only gases

• Only solids

What can damage the balance of an ecosystem?

• More air

• Less water

• More sunlight

• Newly introduced species