Phases Eclipses Tides The moon revolves around the

Phases, Eclipses, & Tides The moon revolves around the Earth as the Earth revolves around the sun. ★ The positions of the moon, Earth, & the sun cause the phases of the moon, eclipses, and tides. �

Motions of the Moon: � As the moon revolves around the Earth it rotates on its own axis � The moon & Earth have synchronous rotation, meaning the same side of the moon always faces Earth. � The “far side” of the moon always faces away from Earth & is never seen.

Phases of the Moon: � The moon does not produce its own light, instead it reflects the light from the sun. � The moon has 8 phases and goes through the whole set once a month, or 29. 5 days. � What Causes Phases? ★The phase of the moon you see depends on how much of the sunlit side of the moon faces Earth.

The Cycles of the Phases: �From one full moon to the next it takes about 29. 5 days. �The 8 phases of the moon in order are: New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Third Quarter, Waning Crescent.

Eclipses ★When the moon’s shadow hits Earth or Earth’s shadow hits the moon, an eclipse occurs. �There are 2 types of eclipses: solar (sun) eclipse & lunar (moon) eclipse. �The type of eclipse is named for what is being blocked from Earth. � Total solar eclipse Total lunar eclipse

Solar Eclipse The umbra is the darkest and smallest part of the shadow & is cone shaped (total darkness). The penumbra is the largest part of the shadow (partial darkness). �Total Solar Eclipse: ○ Only people in the umbra experience a total solar eclipse. �Partial Solar Eclipse: ○ In the penumbra, people only see a partial eclipse; since part of the sun is still visible, it is not safe to look directly at the eclipse.

Lunar Eclipse � During a full moon the Earth blocks the sun’s light from reaching the moon making the moon look dark from Earth. �Total Lunar Eclipse ○ When the moon is in the Earth’s umbra, there is a total lunar eclipse �Partial Lunar Eclipse ○ The moon passes partly into the umbra of the Earth’s shadow.

The Tide Cycle �The moon’s gravity pulls Earth’s water toward itself and away from 2 opposite places, creating low tides. �All 4 tides rotate in a 25 hour cycle.

Spring & Neap Tides �Spring tides occur twice a month, one at full moon & one at new moon. �The combined force of the sun & moons gravity make a tide with the most intense high & low tide. �Neap tides happen 2 times a month, one at first quarter moon & one at third quarter moon. �The sun & Earth are at right angles and creates tides with the least intense difference between high & low. (It’s like a tug-of-war between the moon and sun).