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Earth,Sun,Moon
2-6-2012
| Question | Answer |
|---|---|
| axis | an imaginary line around which the earth spins |
| core | the central part of the sun |
| corona | the outermost part of the sun's atmosphere |
| crater | a bowl-shaped hole on the moon |
| day | the complete rotation of Earth on its axis; 24 hours; the daylight hours |
| Earth | the third planet from the sun in the solar system |
| ellipse | an oval shape |
| gravity | the force that keeps planets in orbit around the sun and governs the rest of the motion in the solar system |
| lunar eclipse | when the Earth passes between the moon and the sun, casting a shadow on the moon |
| mare | smooth places on the surface of the moon |
| moon | a celestial body that revolves around a planet |
| night | the time from dusk to dawn when no sunlight is visible |
| orbit | the path the moon, planets, asteroids, and comets follow as they travel around the sun |
| penumbra | the outside fringe of the shadow cast by Earth during a lunar eclipse |