1. Phases, Eclipses, and Tides
Section 19.3

2. Moon Motions Revolves around Earth once every 27.3 days
Rotates around its axis
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 February Snow Moon
March Sap Moon
April Pink Moon
May Flower Moon
June Strawberry Moon
July Buck Moon
August Sturgeon Moon
September Harvest Moon
October Hunter Moon
November Beaver Moon
December Cold 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