| A | B |
|---|
| Organism | A living thing |
| Habitat | An environment that provides the things an organism needs to live, grow, and reproduce |
| Unicellular | A single-celled organism |
| Multicellular | An organism made of many cells |
| Photosynthesis | A process in which water and carbon dioxide are combined using the sun's energy to make food. |
| Cellular respiration | The process organisms use to release the energy stored in food |
| Word equation photosynthesis | water + carbon dioxide --> glucose + oxygen |
| Word equation respiration | glucose + oxygen --> water + carbon dioxide (+ energy) |
| Ecosystems | The community of organisms that live in a particular area, along with their nonliving surroundings. |
| Ecology | The study of how living things interact with each other and with their environment. |
| Chloroplast | An organelle found in plant cells that contains chlorophyll |
| Chlorophyll | A molecule containing green pigment that can absorb energy from the sun for photosynthesis |
| Micro-organism | Unicellular organism that can only be seen using a microscope |
| Producer | An organism that can make its own food |
| Consumer | An organism that obtains energy by feeding on other organisms |
| Herbivores | consumers that eat only plants |
| Carnivores | consumers that eat only animals |
| Omnivores | consumers that eat both plants and animals |
| Decomposers | organisms that break down wastes and dead organisms and return the raw materials to the ecosystem |
| Food chain | linear diagram showing simple feeding relationships |
| Food web | diagram of feeding relationships, usually including multiple food chains and all trophic levels |
| Adaptations | The behaviors and physical characteristics that allow organisms to live and reproduce successfully in their environments. |
| Root | The part of a plant that keeps in anchored and absorbs water and dissolved nutrients from the soil |
| Stem | Part of a plant that provides support and contains transport systems between the roots and leaves |
| Leaves | Part of the plant where photosynthesis occurs |
| Germination | When a seed sprouts, beginning its growth into a new plant |
| Acid rain | Rain with a lower pH than normal rain |
