| A | B |
|---|
| ecology | the study of the interactions of living organisms with one another and their environment. |
| ecosystem | a community of organisms and the non living parts of their environment (water, rocks, light and temperature) |
| community | all of the populations of a species that live and interact together |
| biosphere | the part of Earth where life exists |
| carbon dioxide | a heavy colorless gas that is absorbed from the air by plants in photosynthesis |
| photosynthesis | a process where organism use sunlight to make food |
| chlorophyll | a green pigment in plants that captures light energy from the sun |
| cellular respiration | the process when cells use oxygen to produce energy from food |
| nitrogen | a gas. 78% of the Earth's atmosphere is nitrogen gas. Most organisms cannot use nitrogen directly. BActeria is the soil helps change nitrogen into other forms that plants can use |
| biotic | living factors in the environment |
| abiotic | non living factors in the environment |
| population | a group of the same species that lives together |
| herbivore | an organism that eats only plants |
| carnivore | an organism that eats animals |
| omnivore | an organism that eats plants and animals |
| food chain | a diagram that shows how energy in food moves from one organism to another. |
| food web | a diagram that shows the feeding relationships between organisms in an ecosystem |
| consumer | an organism that eats other organisms or organic matter |
| producer | an organism that can make it's own food by using energy from it's surroundings |
| decomposer | an organism that gets energy by breaking down dead organisms or animal wastes. THey consume or absorb the nutrients |
