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Sun-Earth-Moon System Vocab
Terms in this set (31)
the spinning of an object around a central axis-one complete turn. One rotation of Earth makes one day.
a curved path that one object takes as it moves around another object.
a round, three dimensional object whose surface is the same distance from its center at all points. Earth is a sphere that bulges somewhat at the equator and is slightly flattened at the poles.
imaginary vertical line cutting through the center of Earth, and around which Earth spins.
elongated, closed curve that describes Earths yearlong orbit around the Sun.
a smaller body that revolves around a larger body. A satellite can be a moon or human made object that orbits a planet. The moon is Earths natural satellite.
point at which the Sun is the highest in the sky and when shadows are the shortest.
twice yearly point at which the Sun is directly over the equator and the number of daylight and nighttime hours are equal worldwide (spring and fall)
twice-yearly point at which the Sun reaches its greatest distance north or south of the equator. (winter and summer)
the result of different amounts of sunlight falling on a hemisphere at different times of the year.
the half of the Earth that is north of the Equator
the half of the Earth that is south of the Equator
star of the northern hemisphere towards which the axis of the Earth points. Earth's north axis currently points to the star called Polaris, which is currently known as the "North Star"
change in appearance of the Moon as viewed from the Earth, due to the relative positions of the Moon, Earth and Sun
moon phase that occurs when the Moon is between Earth and the Sun, at which point the Moon cannot be seen because its lighted half is facing the Sun and its dark side faces the Earth
describes phases following a new moon, as more of the Moon's lighted side becomes visible.
phase that occurs when the Moons entire surface facing Earth reflects lights
describes phases that occur after a full moon, as the visible lighted side of the moon grows smaller
occurs when the Moon passes directly between the Sun and Earth and casts a shadow over part of Earth, this will happen during a new moon
the darkening of the Moon as it passes through Earth's shadow, this will happen during a full moon.
When one solar system object passes between the sun and another object, casting a shadow.
daily rise and fall of the oceans, caused mainly by the gravitational pull of the moon
when ocean water swells to its highest point
when ocean water sinks to its lowest level
the sun's outer atmosphere, it is only visible during a total eclipse and it appears as a pearly white crown
radiant energy given off by the sun
a continuous stream of plasma ejected by the sun, flowing outwardly from the sun's corona
the surface of the Sun
any dark, irregular spots that usually appear in groups on the surface of the Sun
display of light in the sky, usually at high latitudes; formed where particles from the sun enter Earth's atmosphere and magnetic fields
the Northern Lights
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