| A | B |
|---|
| producer | An organism that can make its own food |
| consumer | An organism that obtains energy by feeding on other organisms |
| herbivore | A consumer that only eats plants |
| carnivore | A consumer that eats only animals |
| omnivore | A consumer that eats both plants and animals |
| scavenger | A carnivore that feeds on the bodies of dead organisms |
| decomposer | An organisms that breaks down wastes and dead organisms |
| food chain | A diagram of the energy flow from one organisms to another in an ecosystem |
| food web | A diagram that shows all of the possible feeding relationships in an ecosystem |
| energy pyramid | A diagram that shows the amount of energy that moves from one feeding level to another in a food web |
| decomposition | The breakdown or decay of organic matter into substances that plants can use for growth |
| photosynthesis | The process of combining water and carbon dioxide using sunlight to produce glucose and oxygen |
| aerobic respiration | The process of combining glucose and oxygen to produce carbon dioxide, water and energy |
| pathogen | An organism that can cause disease |
| manure | Waste products from livestock |
| organic matter | Matter made by living things |
| anaerobic respiration | The breaking down of organic matter with out oxygen |
| methane | A gas produced when carbohydrates are anaerobically broken down |
| alcohol | The product of breaking down sugars in the absence of oxygen |
| litter | The layer of dead leaves and other organic matter on the soil surface |
