4/30 & 5/1 - 8 th grade agenda learning objective: learn about the inner planets collect hw:...
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4/30 & 5/1 - 8th Grade Agenda
Learning Objective: Learn about the inner planetsCollect HW: Reading & Notetaking p.241 – 243Video: When we left EarthTextbook Reading: p.552 - 556HW: Reading & Notetaking p.244– 245
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Daily Reflection
• Prompt: Write 3 questions about the Mercury, Venus and Mars.
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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
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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
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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
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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
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The sun’s atmosphere has three layers Ph___sphere, the
Ch____sphere and the C_____
• Photosphere: Inner Layer (Generate most of the light)
• Chromosphere: Middle layer (reddish)
• Corona: Outer layer (Looks are a crown)
oto
romo orona
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Layers of the Sun
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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
pots
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Solar Fl____
• Solar Flares are eruptions on the sun
• Releases large amounts of magnetic energy.
• Can cause electrical problems here on Earth
ares
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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
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Mercury
• Smallest Planet• Closest to the Sun• It has almost no
atmospheres• Surface temperature
is 430C to -170C
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Mercury
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Venus
• Atmospheric Pressure is 90 X greater than Earth
• Clouds are made of sulfuric acid
• Atmosphere is carbon dioxide
• Surface temperature is 460C
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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
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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
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Mars Phoenix Lander Landed on May 25th 2008
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Possible Ice on Mars
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Photos of Mars from Curiosity Rover (Landed in 2012)