AIM: What causes the phases of the moon, solar/lunar eclipses and tides?

Moon Phases, Eclipses, TidesOBJ: Given notes, images and activity sheet SWBAT explain what causes the phases of the moon, solar/lunar eclipses and tides with 70% accuracy

DN: HW check- Gravity & Motion Activity Sheet

ACT: Introduction to Moon Phases, Eclipses, Tides (notes)Complete Moon Phases Activity Sheet

HW: Complete Phases, Eclipses & Tides Activity Sheet; Work on Astronomy Activity Sheet; Astronomy Exam, Dec 19; Return Weather & Climate (Red) Textbook, Dec 18,19.

Motions of the MoonMoon revolution: 27.3 days

Moon rotation: 27.3 days

Moon’s rotation = Moon’s revolution

same side of the moon always faces Earth

Moon phases, eclipses, tides caused by moon’s orbit (revolution) around Earth

Waxing: moon becomes brighter each day

Waning: moon becomes darker each day

Phases of the MoonWe see Moon due to reflected light from Sun.

Phases: different shapes of the Moon.

Moon Phases caused by moon’s revolution around Earth. Half of the moon is always in sunlight. Phases of the moon depends on how much of the sunlit side of the moon faces Earth.Phases of the Moon Cycle: 29.5 days/ ~ month

new moon to next new moon = month

full moon to next full moon = month

Phases of the Moon

EclipsesEclipse: blocking sunlight; due to moon’s orbit slightly tilted (5º) with respect to

Earth’s orbit around the sun.

Solar (sun) eclipse: when the moon is between sun and earth, and blocks sunlight from reaching Earth; a new moon

blocking your view of the sun.

Lunar (moon) eclipse: occurs at a full moon when Earth (between sun and moon) blocks sunlight from reaching the moon.

Eclipses

TidesTide: rise and fall of ocean water every ~12.5 hours due to the

moon’s gravitational

pull on Earth.

Spring Tide: greatest difference between low and high tide; when sun, moon and earth are aligned in a straight line.

Neap Tide: least difference between low and high tide; when sun, earth and moon are aligned normal (90º) to each other.

Tides