Phases, Eclipses, and Tides

Section 19.3

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

MoonPhases

29.5 daycycle

• Teachers' Domain: Phases of the Moon

http://www.moongiant.com/Blue_Moon_Calendar.php

Names of the Full Moons

January Wolf MoonFebruary Snow MoonMarch Sap MoonApril Pink MoonMay Flower MoonJune Strawberry MoonJuly Buck MoonAugust Sturgeon MoonSeptember Harvest MoonOctober Hunter MoonNovember Beaver MoonDecember Cold Moon

Blue Moon – second full moon of a single month. Occurs, on average, every 2.72 years

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 viewthe eclipse

Partial Eclipse of the Moon

• http://www.moongiant.com/Lunar_Eclipse_Calendar.php

• http://www.timeanddate.com/eclipse/lunar-eclipse-november-2012.html

Solar Eclipse

• http://www.timeanddate.com/eclipse/total-solar-eclipse-november-2012.html

• http://eclipse.gsfc.nasa.gov/SEanimate/SEanimate2001/SE2012Nov13T.GIF

What causes tides?

• Tides are caused by gravity between the Earth, moon, and sun

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

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

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

Tides