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3rd Unit 9 Space
Term | Definition |
---|---|
An imaginary line going through Earth from the North Pole to the South Pole. | axis |
The spinning of Earth. This causes the cycle of day and night. One rotation takes 24 hours, or 1 day. | rotation |
The changes in the height of ocean water. The pull of the moon's gravity causes this. | tide |
A medium-size star in our solar system. | sun |
The movement of Earth around the sun. This causes the cycle of seasons. One revolution takes 365 days, or 1 year. | revolution |
A ball of hot, glowing gases. | star |
A tool that makes faraway objects seem larger and closer. | telescope |
A star, such as our sun, and the planets that revolve around it. | solar system |
A large round body that revolves around a star in a clear orbit. | planet |
The cycle of the moon. New moon, 1st quarter, Full moon, 3rd quarter. | phases |
This tells how much light a star gives off. | brightness |
Mercury, Venus, Earth, and Mars | inner planets |
Jupiter, Saturn, Uranus, and Neptune | outer planets |
Separates the inner planets from the outer planets | Asteroid belt |
The inner planets are also known as this. | terrestrial planets |
The outer planets are also known as this. | gas giants |