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Material from the object that collided with Earth and the Earths outer layers were ejected into orbit around Earth, and it formed a ring. Gravity caused the material of the ring to form the moon.

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Scientists theorize a planet-sized object collided with Earth to form the moon

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The theory of the moons origin that seemed most possible is the collision-ring theory

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Tides are the periodic rise and fall of the water in the ocean and its produced by the attraction of the moon and sun.

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Since our moon does not have an atmosphere- nothing can stop even the smallest meteoroids from striking its surface!

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http://www.space.com/55-earths-moon-formation-composition-and-orbit.html

http://www.universetoday.com/62140/surface-of-the-moon/

California Physical Science Textbook

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There is no water in space. The temperature is low there, so if there was water it would freeze and stay there

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Some of the light-colored features seen on the moon's surface. The peaks of lunar highlands and the rims of the craters cast dark shadows, which can be seen.

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The temperature of the moon is 130 Celsius. Temperature on the moon varies because it has no atomosphere. Gravity is weak on the moon, so gas easily can get into space. The moon has no air and it is dry.

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The moon is 3,476 kilometers in diameter. The moon has one-eightieth as much mass as Earth

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Large round pits. Some craters can be hundreds of kilometers across. Craters were caused by the impacts of meteoroids, chunks of rock or dust from space.

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The moon is the closest neighbor to Earth

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Dark, flat areas on the moon.

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Features on the moon's surface include maria, craters, and highlands.

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When the sun pulls the moon at a right angle , it produces a neap tide. Neap tides make tides that have high and low tides at different times

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When a low and a high tide combine forces they produce a spring tide

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After about 29.5 days after a new moon, a cycle is complete. And a new moon will occur again.

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The umbra is the very darkest part of the solar eclispe.

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Low tides occur between the two high tides

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When the moon passes directly between the Earth and the sun, blocking sunlight from the Earth.

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When the Earth pulls toward the moon the force causes high tides.

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Tides are caused by differences in the moons gravity pull on different parts of the Earth

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Phases are caused by changes in the relative positions of the moon, Earth, and the sun. Because the sun lights the moon, half the moon is almost always in sunlight. Since the moon revolves around Earth, we see the moon from different angles.

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Phases are the different shapes of the moon that we see from Earth!

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An eclipse happens when the moons shadow

hits Earth or Earth's shadow hits the moon. There

are two types of eclipses, lunar and solar.

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The light we see when the moon is out is actually the sun reflecting on the moon!

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The phase of the moon you see depends on how much of the sunlight side of the moon faces the earth