| A | B |
|---|
| Adaptation | Behavioral or Physical characteristic that allows an organism to survive or reproduce in its environment |
| Carbon Dioxide | a heavy odorless colorless gas formed during respiration |
| Competition | The struggle between organisms to survive as they attempt to use the same limited resource. |
| Decomposer | An organism that breaks down chemicals from wastes and dead organisms and returns the important materials to the soil and water. |
| Food Web | The pattern of overlapping food chains in an ecosystem. |
| Oxygen | A colorless orderless gas that is released during the process of photosynthesis. |
| Population | All the members of one species in a particular area. |
| Producer | An organism that can make its own food. |
| Variation | Any difference between individuals of the same species |
| Animal Behavior | is the expression of an effort to adapt or adjust to different internal and external conditions. |
| Carnivore | A consumer that eats only animals |
| Consumer | An organism that obtains energy by feeding on other organisms |
| Energy Pyramid | A diagram that shows the amount of energy that moves from one trophic level to another in a food web. |
| Herbivore | A consumer that eats only plants. |
| Photosynthesis | The process of using water along with sunlight and carbon dioxide to make their own food. |
| Predator | The organism that does the killing in a predator prey interaction. |
| Respiration | The process by which cells break down simple food molecules (Sugar/glucose) and oxygen to release the energy, water and carbon dioxide. |
| Water Cycle | The continuous process by which water moves from Earth's surface to the atmosphere and back. |
| Carbon Cycle | The continuous process by which carbon is cycled on earth. |
| Carrying Capacity | The largest population that an area can support |
| Death Rate | The number of deaths in a population in a certain amount of time. |
| Food Chain | A series of events in which one organism eats another and obtains energy. |
| Limiting Factor | An environmental factor that prevents a population from increasing. |
| Pollution | undesirable state of the natural environment being contaminated with harmful substances as a consequence of human activities |
| Prey | An organism that is killed and eaten by another organism. |
| Species | A group of organisms that are physically similar and can mate with each other and produce offspring that can also mate and reproduce. |
| Community | All the different populations that live together in an area. |
| Population | All members of one species in a particular area. |
| Ecosystem | The community of organisms that live in a particular area, along with their nonliving surroundings. |
| Niche | The role of an organism in its habitat, or how it makes its living. |
| Succession | The series of predictable changes that occur in a community over time. |
| Condensation | The process by which a gas changes to a liquid. |
| Precipitation | Rain, snow, sleet, or hail. |
| Evaporation | The process by which molecules of a liquid absorb energy and change to a gas. |
| Glucose | A sugar that is a major source of energy for the body's cells. It is a product of photosynthesis |
| Habitat | The specific environment that provides the things an organism need to live, grow, and reproduce. |
| Natural Selection | A process by which individuals that are better adapted to their environment are more likely to survive and reproduce than others of the same species. |
| Symbiosis | A close relationship between two organisms of different species that benefits at least one of the organisms. |
| Mutualism | A close relationship between organisms of two species in which both organisms benefit. |
| Commensalism | A relationship between two species in which one species benefits and the other is neither helped nor harmed. |
| Parasitism | A relationship in which one organism lives on or in a host and harms it. |
| Trophic Level | An organism's position on the food chain |
| Abiotic | A nonliving part of an organism's habitat |
| Biotic | A living part of an organism's habitat. |
