Unit 2: Part 5 Key terms- Human Impacts on Global Systems

Endemic

Species found in only one region of the world. Limited and restricted habitat. No other population of the same species anywhere else in the world.

Threatened

A species that is likely to become endangered within the foreseeable future.

Endangered

A species that is extremely threatened by extinction.

Extinct

The death of all members of a species of plants, animals, or other organisms.

Greenhouse Effect

Heat comes in from the sun, but the atmosphere is so thick with greenhouse gasses, that the heat can’t leave the planet.

Ozone

Layer in the atmosphere that absorbs and reflects radiation so less hits the earth.

Climate Change

Long term shift in Earth's overall temperatures and weather patterns.

Pollution

Introduction of harmful substances, waste, or energy into the natural environment, making it dirty, unsafe, or unhealthy for living things.

Habitat/Ecosystems

Water Cycle

Evaporation, Condensation, Precipitation

Carbon Cycle

The cycle of carbon through the atmosphere, fossils, animals, plants, etc.

Nitrogen Cycle

Cycle of nitrogen through, lightening, soil, bacteria, plants, and animals.

Phophorus Cycle

Cycle of Phosphorus through rain, soil, plants, and animals.