| A | B |
|---|
| Hypothesis | An educated guess that can be tested |
| Scientific Method | Problem solving procedure scientists use |
| Earth Science | The study of Earth and space |
| Variables | The different factors that can change in an experiment |
| Independent Variable | The variable that you change |
| Constants | The variables that do not change |
| Dependent Variable | The variable that is being measured |
| Technology | The use of scientific discoveries for practical purposes |
| Scientific Theory | An explanation or model backed by results obtained from many tests or experiments |
| Scientific Law | A rule that describes the behavior of something in nature |
| Sphere | A round three dimensional object |
| Axis | An imaginary vertical line around which Earth spins |
| Rotation | The spinning of Earth on its axis |
| Revolution | Earth's yearly orbit around the Sun |
| Ellipse | An elongated, closed curve |
| Solstice | The day when the Sun reaches its greatest distance north or south of the equator |
| Equinox | Occurs when the Sun is directly above Earth's equator |
| Moon phases | Different forms that the Moon takes in its appearance from Earth |
| New Moon | Occurs when the Moon is between Earth and the Sun |
| Full Moon | Occurs when all of the Moon's surface facing Earth reflects light |
| Waning | You see less of the the Moon's surface every night |
| Waxing | You see more of the Moon's surface every night |
| Solar Eclipse | Occurs when the Moon moves directly between the Sun and Earth and casts it shadow |
| Lunar Eclipse | When the Earth's shadow falls on the Moon |
| Maria | Dark, flat regions on the surface of the Moon |
