| A | B |
| Producer | organism that makes its own food |
| Consumer | organism that feeds on other organisms |
| Decomposer | organism that gets energy from breaking down dead organisms or animal waste |
| Scavenger | eats dead or decaying organic matter. |
| Abiotic Factor | Non Living part of an Environment |
| Biotic Factor | Living part of an Environment |
| Photosynthesis | How plants make food using Carbon dioxide, sunlight, and water. |
| Observation | the careful watching and recording of something as it happens |
| Bio | Living |
| System | parts that work together in a meaningful way |
| Photosynthesis | How plants make food. Sunlight + water + CO2 = food-energy-water vapor |
| Habitat | the place that is natural for organisms to live |
| Environment | everything that surrounds an organism and influences it |
| Ecosystem | all of the living and nonliving parts of an environment |
| Food Web | connected food webs that show the feeding relationships in an ecosystem |
| Food Chain | series of events in which one organism eats another and obtains energy |
| herbivore | eats only plants |
| carnivore | eats only other animals |
| omnivore | eats both plants and animals |
| detritivore | an organism that feeds on dead plants and sticks (detritus) |
| detritus | organic matter made up of dead twigs sticks and leaves |
| compost | decaying organic matter |
| recycle | to use again |
| redworm | a detritivore that lives in the layer of dead and deccaying leaves |
| microorganism | microscopic organisms too small to see without a microscope like bacteria |
| zooplankton | microscopic animals in aquatic environments |
| predator | an animal that preys on other animals |
| phytoplankton | microscopic plant like producers found in aquatic environments |
| multicellular | an organism composed of many cells |
| bacteria | microorganims that act as decomposers |
| plants, animals, mold, fungus, bacteria, algae | Biotic factors in an Ecosystem |
| air, soil, rocks, light, water | Abiotic factors in an Ecosystem |
| Atmosphere | the layer of gases surrounding Earth |
| Geosphere | EArth's core, mantle, and crust |
| hydrosphere | the water on, under, and above Earth's surface |
| Biosphere | The living organisms on earth |
| subsystem | a small system that is inside a larger system |