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Reflect on Today’s Presentation Space Debris Dr. David Wright Moon Rocks Apollo Missions • 6 successful • Collected (200) samples • Brought back 382 kg = 840 lbs. of rock Fra Mauro Sea of Rains Oceans of Storms 14 17 15 11 12 16 Descartes Highlands Sea of Serenity Sea of Tranquility 1st (3) Apollo Moon Landings • Focused on engineering test flights Last (3) Apollo Moon Landings • Focused on scientific inquiry Rocks on Earth Sedimentary Igneous On or Below Earth’s Surface On Earth’s Surface Metamorphic Below Earth’s Surface Digging at a rate of one foot per minute, it would take you 87 years to tunnel all the way through Earth. Igneous Rock • Means FIRE in Greek forms when molten rock cools and turns to solid rock Metamorphic • means: to change form meta = change morph = shape Rocks change because of extreme heat & pressure below Earth’s surface Animation Sedimentary Rock Rock is weathered sediments Sediments are eroded Sediments are deposited Sediments are cemented together Deposition Animation Unique Moon Rocks • NO sedimentary rocks Because NO atmosphere NO liquid water No wind No weather Glaciers Groundwater Rivers U.S. Landscapes formed by Erosion Highlands Maria contained mostly basalts Form when lava cools on the Moon’s surface contained mostly feldspar containing rocks Form when lava cools slowly below the Moon’s surface Maria Basalts basalt vesicular basalt Highlands Anorthosites Rocks that contain mostly feldspar over 4 billion years old Density • The relationship between an objects mass & its volume Density = mass (g) volume (ml or cc) An objects density does not change based on the size of the sample. The moon is Earth’s only natural satellite. • The moon's gravitational force is only 17% of the Earth's gravity. For example, a 100 pound (45 kg) person would weigh only 17 pounds (7.6 kg) on the Moon. • The moon's density is is about 3/5 the density of the Earth. TEMPERATURE daytime highs of about 130°C = 265°F to nighttime lows of about -110°C = -170°F THE ORIGIN OF THE MOON Most scientists believe that the moon was formed from the ejected material after the Earth collided with a Mars-sized object. This ejected material coalesced into the moon that went into orbit around th Earth. This catastrophic collision occurred about 60 million years after Earth itself formed (about 4.3 billion years ago). This is determined by the radioisotope dating of moon rocks.