Space Unit


Terms in this set (...)

What are the planets in our solar system? (in order from their distance from the sun)
1. Mercury
2. Venus
3. Earth
4. Mars
5. Jupiter
6. Saturn
7. Uranus
8. Neptune
Gas Giants
-Planets composed of gas (larger planets)
- Further from the sun
- Jupiter, Saturn, Uranus and Neptune
Terrestrial Planets
- Rocky Planets
- Closer to the sun
- Mercury, Venus, Earth, Mars
-3rd planet from the sun
- only planet in our solar system that supports life
- Covered with oceans
- Takes about 365 days to revolve around in the sun
- Takes about 24 hours to rotate on it's axis
-Younger than the Earth
-Satelite of Earth
- Takes about 28 days to complete a cycle
-Burning ball of gas
-gravity causes the planets to orbit the sun
-Moving around an axis
-Earth rotates on it's axis
- Move in a circular orbit around something
-Earth revolves around the sun
What causes night and day on Earth?
- The rotation of the Earth causes night and day
- When a point on the Earth is facing the sun it is day
- When a point on the Earth is facing away from the sun it is night
What causes the seasons to change on Earth?
- The tilt of the earth's axis and its revolution around the sun causes the season
- The angle at which the sun's rays hit the Earth
New Moon
Waxing Crescent
First Quarter
Waxing Gibbous
Full Moon
Waning Gibbous
Waning Crescent
Apollo Missions
- To get astronauts on the moon
-To win the space race against the Soviets and other Communist countries
-To take samples from the moon to research
-To take pictures of the Earth from Space
Ptolemy and Aristotle
- Believed in a earth-centered model (geocentric)
- Thought earth was the center of the universe
-believed the planets and stars revolved around the earth
-Proved Copernicus' theory that the earth moved around the sun
-Proved the earth was not the center of the universe
-Invented a telescope
-Thought the planets moved around the sun
-Believed in a sun-centered model (heliocentric)

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