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CAES Unit 9 Vocab
Solar System
Question | Answer |
---|---|
Small, rocky objects that orbit the sun | asteroid |
Imaginary line that runs from one pole, through the center of a spinning object to the other pole | axis |
Ball of ice and dust that orbits the sun along an elongated path | comet |
Revolves around the sun and maintains a nearly round shape as planets do, but it cannot move other objects away from its orbital neighborhood | dwarf planet |
Oval shaped orbit of the planets around the sun | ellipse (elliptical orbit) |
When greater than one quarter of the moon is illuminated; from the Latin word for “humped back” | gibbous phase |
Force that keeps planets in motion around the sun; acts everywhere in the universe | gravity |
Meteoroid that has entered the Earth’s atmosphere forming a bright streak of light; also called a shooting star | meteor |
Natural satellite that revolves around a planet | moon |
When the lighted half of the moon is facing away from the Earth and therefore not visible from Earth | new moon phase |
Celestial body that does not produce its own light, is larger than an asteroid, and is illuminated by light form a star, such as the sun, around which it revolves | planet |
Motion of an object around another object | revolution |
Motion of an object around its own axis | rotation |
Caused by a combination of the tilt of Earth on its axis, the curvature of Earth’s surface, and the angle at which sunlight strikes the surface of Earth | season |
Rise and fall of ocean water levels caused by the gravitational pull of the moon and sun on Earth | tide |
Lighted part of the moon that is decreasing; shadow is on the right | waning |
Lighted part of the moon that is increasing; shadow is on the left | waxing |