| A | B |
|---|
| theory | the most logical explanation for events that occur in nature |
| geology | the study of the Earth's origin |
| meteorology | the study of the Earth's atmosphere, weather, and climate |
| oceanography | the study of the oceans |
| astronomy | the study of planets, stars, and space |
| scientific method | a systematic approach to problem solving |
| variable | the factor being tested in an experiment |
| control | does not contain the variable |
| data | recorded observations and measurements |
| metric system | the scientific system of measurement |
| meter | basic unit of length |
| light-year | the distance light travels in one year |
| liter | the basic unit of volume |
| kilogram | the basic unit of mass |
| newton | the basic unit of weight |
| volume | the amount of space an object takes up |
| mass | the amount of matter in an object |
| weight | the attraction of two objects due to gravity |
| density | the mass per unit of volume |
| refracting telescope | uses a series of lenses |
| reflecting telescope | uses a series of mirrors |
