Unit 3 🟢

Changes of the moon are predictable and repeat over and over.

Moon spinning around imaginary axis. 29 DAYS

Orbiting or moving around another body. Takes 29 days. EACH MONTH

Changes in the appearance of the Moon’s lighted and dark areas…. Caused by the Moon’s REVOLUTION around the Earth Due to the changing relative position and angle between the: Earth, Moon, and Sun

RIGHT SIDE BRIGHTER

RIGHT SIDE DARKER

• The Moon’s gravity is the main cause of the rise and fall of the tides (Sun’s gravity is the secondary cause) • Tides are a cyclic change because they repeat and are predictable • Tidal changes Each day coastal areas gets two high and two low tides • A full cycle takes 12 hrs 26 min. (high ­ high, or low ­ low)

Sun, Earth, and Moon are all lined up This happens twice each month during New and Full Moon Phases.

Are weakest tides of the month Sun, Earth, and Moon at 900 (right angles) to each other This happens twice each month during 1st and 3rd quarter Phase

a. Looking at the Moon, Earth blocks sunlight from reaching the Moon b. Moon passes through Earth’s shadow c. Occurs at night d. Happens during Full Moon Phase

a. Looking at the Sun, Moon blocks sunlight from reaching a small part of Earth’s surface b. Occurs during the day c. Occurs ONLY at New Moon phase d. Moon appears the same size as the Sun, but it is 400 times smaller than the Sun (b/c is also 400 times closer).

Eclipses do not happen every Full or New Moon (every 2 weeks) because….. the Moon’s orbit is tilted 5 degrees to the Earth’s orbit.