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For Planetary Science! Planets Let There Be… Moon 100 100 100 100 200 200 200 200 300 300 300 300 400 400 400 400 500 500 500 500 As Seen From Earth Horizon The _________ is the line where the sky and the Earth appear to meet.. 100 Rotation The spinning of a planet on its axis is called _______________ 100 Star Our sun is a ____________. 100 Maria The dark parts of the Moon, created by ancient lava flows are called ______ 100 Sun The source of the moon’s illumination (light) is from ___________ 200 Revolution (Orbit) The motion of a planet traveling around the sun is called a 200 A Constellation A group of stars that form a pattern in the sky are called _____ 200 New Moon What is the phase when the moon is between the sun and the Earth? 200 Year The time required for the Earth to orbit the sun once is called a 300 Inner Planets Which group of planets are hotter in temperature, have rocky surfaces, and are smaller? Inner Planets or Outer Planets 300 Light Years Distances between stars are usually measured in ________________ 300 No Atmosphere Why does the moon have so many more craters than the Earth? 300 Rotation The length of a day is based on the Earth’s ________ 400 Seasons The tilt of the Earth as it orbits the sun causes _____________ 400 Temperatures If two stars are different colors, we can infer that they have different ________ 400 Neil Armstrong Who was the first human on the moon? 400 Month A ____________ is roughly the amount of time required for the moon to orbit the Earth. 500 Days What would be shorter if the Earth rotated faster? 500 Summer Solstice The longest day of the year occurs on the _________ 500 True True or False? We only see one side of the moon from Earth. 500