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Transcript
9/15/2014 Sun, Earth, Moon Foldable • Take double-sided handout, tri-fold like a letter with “Sun, Earth, Moon” title on front fold • When complete, glue into notebook. – Don’t forget to date & title your page • Inside fold, all answers are “Sun” Sun Facts • • • • • • • Rotates on an axis Source of heat and light Medium size star Sphere of burning gas plasma A million times bigger than the Earth No real solid surface Temperature on the surface is 5,600°C 1 9/15/2014 Earth Facts • • • • • • • 3rd planet from the sun 4 times larger than the moon Rotates every 24 hours (1 day) on an axis Has (flowing) water and (thick) atmosphere LIFE: plants & living things Only planet to support life Sphere of rock Moon Facts • • • • • • • • Sphere of rock Rotates on an axis No atmosphere No life Surface scarred and cratered Natural satellite 27 days to revolve around the Earth Orbits the Earth 2 9/15/2014 Solar System (bottom) My Very Educated Mother Just Served Us Nachos Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune Sun, Earth, Moon Foldable • We are going to modify it and add more info! • Take a legal size printer paper (8.5 x 14 in) – Cut off bottom 3 in – Fold in half “hot-dog” style, cut along crease – Give half to a friend, keep the other half – Cover bottom solar system half of foldable, tape it on, draw lines 3 9/15/2014 More Sun Facts! Latin (sci-fi) name: Sol; adjective: solar Medium-size, main-sequence star Distance from Earth (mean) = 1.5 x 108 km Light takes 8 min 19 s to travel to Earth Made of mostly hydrogen and helium plasma (not gas) Mass = 1.99 x 1030 kg (about 330,000 Earths) About 4.5 billion years old Not made of fire, but burning plasma by nuclear reaction Has layers determined by density, composition, movement, temperature • Strong, overlapping, magnetic fields • • • • • • • • • More Earth Facts! • Latin (sci-fi) name: Terra; adjective: terran – Also sometimes called Gaia • • • • • • • • • Densest planet in solar system (D = 5.51 g/cm3) Largest rocky planet in system (v = 1.08 x 1012 km3) About 4.5 billion years old Lithosphere broken into tectonic plates Active core (hot, generates energy) Axial tilt 23.4° Strong magnetic field, protects from solar radiation Gravity = 9.8 m/s2 Has layers determined by density, composition, movement, temperature 4 9/15/2014 More Moon Facts! • Latin (sci-fi) name: Luna; adjective: lunar • Always shows same face to Earth (near side) • Slowly moving away from Earth, and slowing Earth’s rotation (lengthening the day) • About 4.5 billion years old • Formed when a Mars-sized planet (Theia) crashed into Earth, the debris became the Moon • Has layers determined by density, composition, temperature • Maria: solidified lava “seas” • Highlands (terrae): lighter, higher areas • Weak magnetic field • Mass = 7.35 x 1022 kg, volume = 2.2 x 1010 km3 • Gravity = 1.62 m/s2, Axial tilt = 1.52° Homework: Sun, Earth, Moon Comparison • In your notebook, date and title your page, then draw a 3-circle venn diagram as shown Sun • Fill it out! 5