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Space Systems
Use to help study for your test on Space Systems
| Question | Answer |
|---|---|
| Axis | The line passing through Earth's center and poles. |
| Rotation | Movement of Earth around its axis. = one day |
| Revolution | Movement of Earth around the sun. |
| Orbit | The path of Earth as it revolves around the sun. |
| Solstices | When the sun is farthest north or south of the equator. We either have longer days (summer) or shorter days (winter). |
| Equinoxes | When the noon sun is directly overhead at the equator. Days and nights will have the same amount of time. (fall and spring ) |
| What gives us seasons? | The Earths tilt and revolution around the sun. |
| Gravity | The attraction of all objects toward each other. |
| Law of Universal Gravitation | Every object in the universe attracts every other object. |
| inertia | The tendency of an object to resist a change in motion. |
| Newton's first law of motion | An object at rest will stay at rest and an object in motion will stay in motion with a constant speed and direction unless acted on by a force. |
| The strength of gravity depends on... | The mass of an object and the distance. |
| The two factors that keep the Earth moving around the earth are? | Gravity and inertia |
| Phases | The different shapes of the moon you see from Earth. |
| Eclipse | When an object in space comes between the sun a shadow is cast called an eclipse. |
| Solar eclipse | Occurs when the Moon passes directly between the Sun and Earth and casts a shadow over part of Earth This can only happen during a full moon. |
| Lunar eclipse | Occurs when the Earth is directly between the moon and sun. This can only happen during a new moon. |
| Umbra | The very darkest part of the moon's shadow |
| Penumbra | The lighter part of the moon's shadow |
| Why do we only see the one side of the moon? | The Moons rotation and revolution are at the same speed. |
| New moon | Sunlight hits the part of the moon facing away from Earth. |
| Waxing crescent | From Earth we see less than half of the right side of the moon. |
| First quarter | From Earth we see the right half of the moon. |
| Waxing gibbous | From Earth, we see more than half of the right side of the moon. |
| Full moon | When the entire sunlit side of the moon faces Earth. |
| Waning gibbous | From Earth, we see more than half of the left side of the moon. |
| Third Quarter | From Earth, we see the left half of the moon. |
| Waning crescent | From Earth we see less than half of the left side of the moon. |
| Natural Satellite | Another name for a moon. |
| Outer Planets | Jupiter, Saturn, Uranus and Neptune. Large planets made of gasses and liquid. |
| Inner Planets | Mercury, Venus, Earth, and Mars. Small and made of rock and metal. |
| Scientific Notation | Uses powers of ten to write very large or small numbers in short form. |
| 8.88 x 10^12 | 888,000,0000,000 |
| 500,000,000 | 5 x 10^8 |
| 6,330,000,000,000,000 | 6.33 x 10^15 |
Created by:
samir.ezzelarb
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