| Term | Definition |
| weathering | the breaking down of rocks by storms and water is |
| glaciers | large ice masses that scraped the Earth's surface and formed the Great Lakes and Long Island |
| el nino | A cyclical warming of the Pacific Ocean. |
| tectonic plates | large movable plates under the Earth's surface. |
| erosion | a washing or carrying away of broken off material. |
| CFCs | pollutant that is contributing to the problem of the hole in the ozone layer |
| sulfur | pollutant that is contributing to the acid rain problem |
| CO2 | pollutant that is contributing to the Green House Effect problem |
| cold water | has more dissolved oxygen and therefore more life in it |
| fresh water | needed by living things for chemical reactions |
| water quality | depends on temperature, nutrients, dissolved oxygen, absence of polutants |
| nutrients | substances needed for life obtained from food (ex. Minerals, vitamins) |
| vitamins | "vital to eat" |
| sun | original source of energy obtained directly or indirectly through food |
| lava | magma that reaches the surface and builds up new land |
| mountain chains | rise when the Earth's surface buckles due to tectonic plate movement |
| earthquakes | mainly occur near edges of tectonic plates that are shifting |
| respiration | animals put CO2 in the atmosphere when transforming energy |
| photosynthesis | plants put Oxygen in the atmosphere when transforming energy |
| cold blooded | animal's body temperature matches the environmental temperature |
| warm blooded | animal's body temperature stays within a certain range despite changes in environmental temperature |
| territory | space needed by animals and may be marked and defended |
| ecosystem | an area in a balance between living and nonliving things. |
| species | a group of organisms that can breed and have fertile offspring |
| habitat | environment where a species lives, gives shelter and warmth |
| geographical range | total area where a species live. |
| population | all the members of one species in an area. |
| community | all the species in an area. |
| biodiversity | more species in an ecosystem makes it healthier |