| A | B |
|---|
| carnivore | animal that eats other animals |
| head, thorax, abdomen | insect's three body parts |
| emergent | tallest layer of the rain forest |
| forest floor | lowest level of the rain forest |
| equator | imaginary line that runs horizontally through the middle of the earth |
| oxygen | released by plants |
| male cicada | the loudest insect |
| herbivore | animal that eats only plants |
| niche | organism's role in an ecosystem |
| host | organism a parasite lives on or in |
| food web | overlapping food chains |
| ecosystem | all the living and nonliving things that interact in an area |
| competition | struggle between organisms for limited resources |
| ecology | study of living things and their environment |
| habitat | place where an organism lives |
| deciduous | trees that shed their leaves in winter |
| photosynthesis | process by which plants make food |
| producer | plant |
| consumer | organism that feeds on other living things |
| climate | typical weather pattern in an area |
| decomposer | organism that breaks down wastes |
| hibernate | rest during the winter |
| extinction | disappearance of all members of a species |
| Global Warming | theory that predicts the average temperature will continue to rise |
| poaching | term for illegal killing of wildlife |
| habitat destruction | major cause of extinction |
| water cycle | how water moves from Earth's surface to atmosphere and back |
| acid rain | precipitation that is more acidic than normal |
| reduce, reuse, recycle | Three Rs |
| recycling | process of reclaiming raw materials and reusing them |
| 1970 | year of first Earth Day |
| 1970 | Environmental Protection Act established |
| Rachel Carson | author of Silent Spring |
| Yellowstone | first national park |
| 50 | number of national parks today |
| 3 | percent of freshwater on Earth |
| litter | trash not disposed of properly |
| pesticide | poison used to kill pests |
| smog | combination of smoke and fog |
| CFC | chloroflourocarbons |
