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Space: chpt. 1 vocab
6TH GRADE Chapter 1 space vocabulary.
| Term | Definition |
|---|---|
| Astronomy | The study of the moon, stars, and other objects in space. |
| Axis | The invisible point about which a planet rotates. |
| Rotation | Spinning about an axis. |
| Revolution | When one object revolves around another object in space. |
| Orbit | The path that an object revolves on. |
| Latitude | Imaginary lines that run West to East, and measure distances North and South. |
| Solstice | When the noon sun is overhead at 23.5 degrees south or 23.5 degrees north. Longest and shortest days of the year. |
| Equinox | Equal daylight and night. |
| Vernal Equinox | The equinox occurring in the springtime. Marks the beginning of Spring. Around March 21st. |
| Autumnal Equinox | The equinox occurring in the fall. Marks the beginning of fall. around September 21st. |
| Phase | The different appearances of the moon as it goes through its monthly cycle. |
| Eclipse | Either solar or lunar eclipses can occur. |
| Solar Eclipse | When the moon comes between the Earth and the sun. A shadow is cast on the Earth. Only happens during the new moon. |
| Umbra | The darkest part of the shadow when an eclipse happens. |
| Penumbra | The lightest part of the shadow when an eclipse happens. |
| Lunar Eclipse | When the Earth envelopes the moon in shadow. Only happens when the moon is full. |
| Tide | The rise and fall of water levels. |
| Gravity | The force that keeps all things on the surface of Earth. Gravitational pull depends on mass and distance. |
| Spring Tide | "Super Tide." Only happens in this order (sun,moon,earth) |
| Neap Tide | A smaller tide than spring tide. Only happens when the sun is at a right angle to the moon. |
| Satellite | Any natural or artificial object orbiting another object in space. |
| Geosynchronous Orbit | When an object revolves around Earth at the same rate that Earth rotates. It appears to hover over one spot. |
| Telescope | An instrument used to make objects appear closer than they really are. |
| Crater | Round pits formed by impacts of meteoroids. |
| Maria | Dark, flat regions. Galileo named them maria, the Latin word for "seas." |