Earth, Moon, and Sun Interactions

Earth, Moon, and Sun Interactions

The Moon • The moon completely revolves around Earth in 27.3 days • The near side of the moon always faces Earth

Phases of The Moon • Phases are the different shapes of the moon that are visible from Earth • Caused by changes in the positions of the sun, Earth, and moon • Phases depend on how much of the sunlit side of the moon faces Earth

MOON PHASES

Tides • The tide is the rise and fall of water • Tides usually rise for 6 hours, then fall for 6 hours Why? • Gravity pulls the moon and Earth towards each other • Differences in how much the moon pulls on different parts of Earth's oceans make tides

Eclipses • An eclipse occurs when an object in space comes between the sun and a third object, and casts a shadow on that object. • When the moon's shadow hits Earth or Earth's shadow hits the moon, an eclipse occurs. • There are two types of eclipses: Solar eclipses and lunar eclipses. • solar=sun • lunar=moon

Lunar and Solar Eclipses

Solar Eclipses • a solar eclipse occurs when the moon passes between the sun and earth, and the moon fully or partially blocks the sun • Solar eclipses only occur at new moons • There are 4 types of Solar Eclipses -a total eclipse -a annular eclipse -a hybrid eclipse -a partial eclipse

Lunar Eclipses • A lunar eclipse occurs when the moon passes directly behind the earth into its umbra(shadow) • This can only occur when the sun, earth, and moon are alligned exactly with the earth in the middle. • A lunar eclipse can only occur the night of a full moon • There are 2 types of lunar eclipses -partial lunar eclipse -total lunar eclipse

Earth's Tilt and Revolution • Earth has 2 revolutions one around the sun and the other on its axis • When the earth revolves it will move closer or farther away from the sun each day • The earth rotates on its axis to the east • Speed of the rotation has many effects over years such as shape, climate, ocean depth currents and tectonic forces

Earth's Tilt and Revolution • Earth is tilted on its axis 23.5 degrees causing seasons • Summer is created when the hemisphere is facing towards the sun and winter is caused when the hemisphere is facing away from the sun • When a hemisphere is tilted towards the sun it will have longer days and short nights and the other away around for the hemisphere tilted away from the sun • The equator has no seasons since the sun usually hits at the same angle everyday.

Sources http://commons.wikimedia.org/wiki/File:AxialTiltObliquity.png http://www.texample.net/tikz/examples/earth-orbit/ http://www.universetoday.com/60655/earth-revolution/ Astronomy book http://www.solarsystem.nasa.gov/images/Moon.jpg https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&docid=aahp76vAd3Pd9M&tbnid=9sM05oBriZfK2M:&ved=0CAUQjRw&url=http%3A%2F%2Fmoonstemple9.blogspot.com%2F2013%2F03%2Fmoon-phases-purpose-and-function.html&ei=rBeDUb_tFurL0AHw2oGQCQ&bvm=bv.45960087,d.dmQ&psig=AFQjCNGb2gpAfd-j7Ap7bnbVMXRpH9c-_g&ust=1367632169878091 http://www.moonconnection.com/lunar_vs_solar.phtml

Earth, Moon, and Sun Interactions