| A | B |
|---|
| biosphere | all living things |
| biodiversity | having lots of different types of animals |
| equator | this is where the earth has the most biodiversity because it is warm |
| organism | an individual living thing |
| cell | the basic unit of life |
| system | when related parts interact to form a whole |
| homeostasis | The maintenance of constant internal conditions in an organism |
| adaptation | a beneficial inherited trait that is passed on to future generations |
| hypothesis | an educated guess that can be tested |
| observation | when a scientists notices something during an experiment |
| dependent variable | the response that is measured (the effect) |
| independent variable | the variable that is manipulated by the scientist (the cause) |
| theory | an idea that is supported by much evidence |
| experimental research | researchers apply treatments to experimental units and observe the effects |
| observational research | investigators observe subjects and measure variables without giving them treatments |
