1. Phases, Eclipses, and Tides Section 19.3

2. Moon Motions Revolves around Earth once every 27.3 days Rotates around its axis once every 27.3 days Because of the moons movements, the same side of the moon always faces Earth

3. Moon Phases 29.5 day cycle

4. FYI Names of the Full Moons January Wolf Moon FebruarySnow Moon MarchSap Moon AprilPink Moon MayFlower Moon JuneStrawberry Moon JulyBuck Moon AugustSturgeon Moon September Harvest Moon OctoberHunter Moon NovemberBeaver Moon DecemberCold Moon Blue Moon – second full moon of a single month. Occurs, on average, every 2.72 years

5. The Shadows Umbra – the darkest part of a shadow Penumbra – the part of a shadow surrounding the darkest part

6. Eclipses When the moon’s shadow hits Earth or the Earth’s shadow hit the moon Half the Earth can view eclipse at the same time Only the people in the umbra can view the eclipse

7. What causes tides? Tides are caused by gravity between the Earth, moon, and sun

8. What causes tides? The moon’s gravity pulls on Earth’s surface closest to the moon causing water to create a bulge Water is stolen from the sides to create the bulge The side of Earth furthest from the moon has the least effect of moon’s gravity and has a bulge that is the “left behind” water

9. Different kinds of tides The sun’s gravity can add to the moon’s pull or even it out depending on the positions of the sun, moon and Earth

10. Different kinds of tides Spring Tides - highest high tides, lowest low tides - sun, moon, & Earth are in line Neap Tides - lowest high tides, highest low tides - sun, moon, & Earth are at right angles

11. Tides