ES Unit 8 & 9 Practice Test

Front

What are the problems associated with landfills?

Back

Problems associated with landfills include source reduction, composting, surface impoundment, leachate, methane production, and more.

Front

What is a keystone species?

Back

A keystone species is an organism that plays a critical role in maintaining the structure of an ecological community, influencing the types and numbers of various other species in the environment.

Front

What does it mean for a species to be endangered?

Back

An endangered species is a species that is in danger of extinction.

Front

What role does the purple sea star play in its ecosystem?

Back

The purple sea star is a keystone species that supports biodiversity in tidepools.

Front

What is methane and why is it significant in landfills?

Back

Methane is a gas produced in landfills that can be captured and used to produce energy; it is also a greenhouse gas.

Front

What is source reduction?

Back

Source reduction refers to practices that reduce the amount of waste generated at the source, minimizing the need for landfills.

Front

What is composting?

Back

Composting is the process of recycling organic waste, such as food scraps and yard waste, into a valuable fertilizer for soil.

Front

What is leachate?

Back

Leachate is a liquid that has percolated through a solid and leached out some of the constituents, often a concern in landfill management.

Front

What is the difference between a threatened species and an endangered species?

Back

A threatened species is likely to become endangered in the foreseeable future, while an endangered species is already in danger of extinction.

Front

What is an invasive species?

Back

An invasive species is a non-native species that spreads widely in a new habitat and can cause harm to the environment, economy, or human health.