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Earth, Moon, and Sun Interactions. Lunar Eclipses. -A lunar eclipse occurs when the Earth passes between the moon and sun -Earth’s shadow obscures the moon or part of the moon -Lunar eclipses occur at night. Solar Eclipses.
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Lunar Eclipses • -A lunar eclipse occurs when the Earth passes between the moon and sun • -Earth’s shadow obscures the moon or part of the moon • -Lunar eclipses occur at night
Solar Eclipses • -A solar eclipse occurs when the moon passes between the Earth and the sun • -Solar eclipses occur during the day • -Solar eclipses can be total, partial, or annular
Types of Solar Eclipses • -Total solar eclipses occur when the sun is completely blocked by the moon • -Partial solar eclipses happen when only part of the sun is visible • -Annular eclipses take place when the moon is at its farthest point in orbit and will not cover the entire sun • -Annular eclipses look like there is a thin ring of light around the moon Total Solar Eclipse Partial Solar Eclipse Annular Solar Eclipse
Tides • -Tides are the periodic rise and fall of large bodies of water • -Caused by the moon’s gravitational pull • -The moon’s pull causes water to bulge out on the side of the Earth nearest the moon, and the side directly opposite of it • -There are 2 tides a day because the earth rotates faster than the moon
Types of Tides • Spring Tides • -Stronger tides • -Occur when the moon, Earth, and sun form a straight line • -Happen on full and new moons (this is when the moon, Earth, and sun are in a straight line) Neap Tides -Weaker tides -Occur when the moon and sun are perpendicular to the Earth -Happen on quarter moons (this is when the sun and moon are perpendicular to the Earth)
Moon Phases • -Different phases are caused by the moon being illuminated at different angles by the sun • -As the moon moves around the sun the side we can see gradually gets brighter • -A waning moon is when the illuminated side is on the left • -A waxing moon is when the illuminated side is on the right • -The moon rotates on its axis at the same rate it revolves around the earth
Seasons • -Seasons depend on the amount of sunlight reaching the Earth • -Caused by the Earth, tilted on its axis, traveling around the sun each year • -As Earth travels around the sun, the hemisphere tilted towards or away from the sun changes • -Hemisphere tilted towards the sun is warmer because it gets more sunlight (sunlight is more direct, less becomes scattered in the atmosphere)
Uneven Heating of the Earth • -At the equator there are no seasons because the sun strikes it evenly year-round • -The poles are always cool because they are never tilted in the direct path of sunlight • -The only big change with seasons occurring at the poles is the amount of daylight • -When the pole is tilted toward the sun there is only daylight (summer) and when the pole is tilted away from the sun there is no sunlight (winter)
Sources • "Moonconnections.com." Moonconnections.com. N.p., 2013. Web. 02 May 2013 • Gaherty, Geoff. "How Moon Phases Work." Space.com. N.p., n.d. Web. 02 May 2013. • Department of Geography, Okanagan University College. "Earth's Oceans: Tides - EnchantedLearning.com." Earth's Oceans: Tides - EnchantedLearning.com. N.p., n.d. Web. 02 May 2013.