| A | B |
|---|
| science | an organized way of using evidence to learn about the natural world |
| observation | the process of gathering information |
| inference | logical interpretation based on prior knowledge or experience |
| hypothesis | a proposed set of scientific explanations for a set of observations |
| variable | factor in an experiment that can change |
| independent variable | the variable changed by the scientist |
| dependent variable | the variable that changes because of the independent variable |
| control | the “normal” conditions |
| constant | anything that stays the same |
| metric system | System of measurement that uses multiples of ten |
| meter | metric unit of length |
| gram | metric unit of mass |
| liter | metric unit of volume |
| celsius | metric unit of temperature |
| light microscope | use more than one lens to magnify a specimen |
| electron microscope | Focuses beams of electrons on the specimen |
| sexual reproduction | two cells from different parents unite |
| asexual reproduction | new organism has one parent. |
| metabolism | reactions through which an organism build up and break down materials. |
| stimulus | a signal to which an organism responds. |
| homeostasis | process by which organisms keep their internal environment stable |
| evolution | change in a kind of organism over time. |
| molecule | groups of atoms |
| cell | smallest functional unit of life |
| organism | individual living thing. |
| population | group of organisms of one type in one place |
| community | populations that live in a defined area |
| ecosystem | community and its nonliving surroundings |
| biosphere | part of earth that contains all ecosystems. |
