Earths Moon Chapter 16 4 Part 1 Moon

Earth’s Moon Chapter 16 – 4 Part 1

Moon Facts • • • Name - Luna Gravity : 17% of Earth Revolution: 27 days 8 hours Rotation: 27 days 8 hours Because the period of revolution equals the period of rotation, the same side of the moon always faces earth.

Surface of the Moon • Oldest rocks are 4. 6 billion years old, same as the Earth • Almost no atmosphere and no erosion • Complete history of impact craters • Temperature: -170 to 134 degrees C

Origin of the Moon • Moon rocks are the same age as the Earth • Formation of the moon happened at or near the formation of the Earth • Possibly a large body collided with Earth and ejected some of the mantle into space which formed the moon

Moonlight • The moon does not generate energy that can be emitted as light. • Like the planets and other bodies in our solar system, it reflects light from the sun.

Phases of the Moon • As the moon revolves around the Earth, the amount of sunlight on the side of the moon that faces the Earth changes. • The different appearances of the moon due to its changing position are called phases. • When the moon is waxing, the sunlit fraction that we can see from the Earth is getting larger. • When the moon is waning, the sunlit fraction is getting smaller.

The Solar Eclipse • A solar eclipse happens when the moon comes between the Earth and the sun. • An annular solar eclipse happens when the moon does not completely cover the disk of the sun. • During a total solar eclipse, the disk of the moon completely covers the sun.

The Lunar Eclipse When sunlight hits the particles in the Earth’s atmosphere, blue light is filtered out. As a result, most of the remaining light that reflects off the moon is red.