The part of the Earth (land, water, air) that contains and supports living things.
What is a biosphere?
100
A piece of land that is contaminated by a hazardous substance.
What is a brownfield?
100
The act of reducing pollution through implementing conservation techniques, reusing materials, modifying production processes, and using less-toxic substances.
What is pollution prevention?
100
Commonly a chemical reaction, between hydrogen and oxygen, that produces electricity.
What is a fuel cell?
200
Species that are losing members of their population at a rate that will lead to becoming endangered if the situation is not changed.
What is a threatened species?
200
A region draining into a river, river system, or other body of water.
What is a watershed?
200
The careful utilization of natural resources in order to prevent depletion.
What is conservation?
200
The sum of all organisms of a species in a given area.
What is a population?
300
A species with so few individuals remaining that it is in danger of becoming extinct.
What is an endangered species?
300
An area that shared the same air due to geography, weather patterns, and climate.
What is an airshed?
300
All individuals of a species have perished, and none are remaining on Earth.
What is extinction?
300
Groups of populations that interact with one another in a given area.
What is a community?
400
The role of a species within a community.
What is a niche?
400
Three oxygen molecules bonded together in the stratosphere; prevents harmful ultraviolet radiation from reaching the Earth's surface.
What is ozone?
400
A biological relationship between two species; includes mutualism, commensalism, amensalism, or parasitism.
What is symbiosis?
400
The relationships formed between a living community and the non-living factors affecting it.
What is an ecosystem?
500
Where an organism lives and includes food, water, shelter, and space.
What is a habitat?
500
Pollution that enters a water system by runoff that cannot be traced to a single, identifiable point.
What is a nonpoint source?
500
Uses two sources of energy; currently the most common is gasoline and electric motors.
What is a hybrid vehicle?
500
Anything that makes the Earth dirty and unhealthy.