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Download 4/20 & 4/21 - 7th Grade Agenda
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4/30 & 5/1 - 8th Grade Agenda Learning Objective: Learn about the inner planets Collect HW: Reading & Notetaking p.241 – 243 Video: When we left Earth Textbook Reading: p.552 - 556 HW: Reading & Notetaking p.244– 245 Daily Reflection • Prompt: Write 3 questions about the Mercury, Venus and Mars. In what units do we measure distances around our solar system ? • AU (Astronomical Unit) • 1 AU = Distance between the sun and the Earth • 1 AU = 93 Million Miles In what units do we measure distances between the stars ? • • • • • Light Year Light travels about 186,000 miles per second 1 Light Year = 65,000 AU 1 Light Year = 6 Trillion Miles Closest Star (Alpha Centari) is about 4.3 Light Years away How much of the solar system’s mass is in the sun? • About 99.8% • Most of the mass of the solar system is in the sun How does the sun generate it’s energy? • Nuclear Fusion • Hydrogen Atoms join together to from Helium • Some of the matter is converted into energy • The Sun’s core reaches about 15 million degrees Celsius The sun’s atmosphere has three oto layers Ph___sphere, the orona romo Ch____sphere and the C_____ • Photosphere: Inner Layer (Generate most of the light) • Chromosphere: Middle layer (reddish) • Corona: Outer layer (Looks are a crown) Layers of the Sun pots Sun S____ • Sunspots look small. But they are larger than Earth. • Sunspots are areas of gas on the sun’s surface that are cooler than the gases around them. • This is why sunspots look darker than the rest of the photosphere. • Sunspots intensifies every 11 years ares Solar Fl____ • Solar Flares are eruptions on the sun • Releases large amounts of magnetic energy. • Can cause electrical problems here on Earth Features of the sun • Nuclear Fusion • Hydrogen Atoms join together to from Helium • Some of the matter is converted into energy • The Sun’s core reaches about 15 million degrees Celsius Mercury • Smallest Planet • Closest to the Sun • It has almost no atmospheres • Surface temperature is 430C to -170C Mercury Venus • Atmospheric Pressure is 90 X greater than Earth • Clouds are made of sulfuric acid • Atmosphere is carbon dioxide • Surface temperature is 460C Venus • Surface of Venus. Pictures taken by the Russian Venera-13 probe in 1982. It lasted only a couple of hours on the Venusian surface Mars • Atmosphere is 95% carbon dioxide • Large amount of liquid water flowed on the Mar’s surface in the distant past. • There are giant volcanoes • Surface temperature is 140C to 20C Mars Phoenix Lander Landed on May 25th 2008 Possible Ice on Mars Photos of Mars from Curiosity Rover (Landed in 2012)
