Compositional and mechanical layers of the earth | Cosmology & Astronomy | Khan Academy
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Crust, mantle, core, lithosphere, asthenosphere, mesosphere, outer core, inner core. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/v/how-we-know-about-the-earth-s-core?utm_source=YT&utm_medium=Desc&utm_campaign=cosmologystronomy Missed the previous lesson? https://www.khanacademy.org/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/v/pangaea?utm_source=YT&utm_medium=Desc&utm_campaign=cosmologystronomy Cosmology & Astronomy on Khan Academy: The Earth is huge, but it is tiny compared to the Sun (which is super huge). But the Sun is tiny compared to the solar system which is tiny compared to the distance to the next star. Oh, did we mention that there are over 100 billion stars in our galaxy (which is about 100,000 light years in diameter) which is one of hundreds of billions of galaxies in just the observable universe (which might be infinite for all we know). Don't feel small. We find it liberating. Your everyday human stresses are nothing compared to this enormity that we are a part of. Enjoy the fact that we get to be part of this vastness! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Cosmology & Astronomy channel: https://www.youtube.com/channel/UChNPnEkW8LYZ5Rwi8_A2-DA?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Comments
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Can I get at least 5 likes because I never get likes
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Hi
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This helped me a lot in science class!
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So this will teach me everything I'm supposed to know?
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caca
jk -
amazing
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charlie LOL
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you spelled deep wrong
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I watched this entire segment of videos and this was a great way to end it. I really like the comparison between the chemical and mechanical layers of the earth!!!!
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Awesome Vid, but it gets a bit boring for us 6th graders...
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Awesome video and explanation man. Thank you.
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I have a quiz this morning, and this was a great visual aid for my Oceanography 201 class. Awesome video.
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Thanks, awesome summary of the earth layers!
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thanx
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Nice quick explanation about the differentiation of the earth. Glad you fixed the part about the mantle! It is propperly explained now =) ty. Maybe you should make a video about convection cells explaining the tectonic movements. Nice work!
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Very interesting! Thank you.
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Thanks sal, great video.
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