AIM: Phases of the Moon Aim: Earth and moon interactions Do Now: Why do celestial objects “Appear” to move? -Because the Earth rotates

I. The Moon The moon is Earths only natural satellite. The moon orbits around the Earth in 27.3 days.

Why is this just a theory? II. Moon Origin Theory Collision Theory: A large object hit Earth, ejecting millions of tons of material which formed into our moon. Why is this just a theory?

III. Phases of the Moon results from the revolution of the moon and the sunlight that is reflected. Waxing – an increasing of the lit portion (from the right). Waning – a decreasing of the lit portion (from the right). Half of the moon is always lit by the sun, but the portion we see depends on your perspective.

IV. Eclipses (named for what is being blocked) Solar Eclipse: The moon blocks a portion of the Sun and casts a shadow on Earth.

View of moons shadow on Earth from space View of the Sun blocked by the moon from Earth

Lunar Eclipse: The moon moves into Earths shadow.

V. Ocean Tides Caused by the gravitational attraction between the Earth and moon as well as the sun. *During full or new moon phases

Closure: Take a “Phases of the Moon” packet from the back top in. Answers: 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) 14) 15) 2 3 4 1 1 4 4 4 1 1 4 2 3 2 4

Tides

Origin of the Moon Theory

II. Phases of the Moon