Four Spheres Part 2 (Hydro and Atmo): Crash Course Kids #6.2 - By Crash Course Kids
Transcript
00:09 | remember when we are putting together the puzzle that is | |
00:12 | our planet using the four spheres as giant pieces . | |
00:15 | Well , we got pretty far last time , but | |
00:17 | we're not done yet . Oh no , that's because | |
00:20 | in addition to the geo sphere and the biosphere , | |
00:22 | which we talked about last time , there are two | |
00:24 | more spheres that we need to complete our planetary puzzle | |
00:27 | . Those are the hydro sphere and the atmosphere . | |
00:30 | So without further ado , let's dive in . See | |
00:33 | what I did there . I said that because the | |
00:35 | first sphere we're going to talk about is the hydro | |
00:38 | sphere . Hydro comes from the greek word for water | |
00:41 | and all of the water on earth is in the | |
00:43 | hydro sphere . This means that every single drop of | |
00:46 | salt water in the oceans , but also all of | |
00:48 | the fresh water in lakes and rivers is in this | |
00:51 | sphere and it includes all of the water trapped in | |
00:54 | glaciers as ice and the water held deep underground . | |
00:57 | Now there's also water in the air around us , | |
01:00 | to which we can sometimes see in the form of | |
01:03 | rain and snow . Those things come from clouds , | |
01:06 | which happened to be way up in the atmosphere . | |
01:09 | Our last but certainly not least , sphere . This | |
01:13 | sphere contains all of the gases on the planet , | |
01:16 | which is fitting since Atmos comes from the greek word | |
01:19 | for air , although we can't really see the atmosphere | |
01:22 | or grab onto it , It reaches everywhere and covers | |
01:25 | the entire planet like a giant snuggly blanket . But | |
01:29 | our atmosphere blanket isn't all the same , it's split | |
01:32 | up into many different layers . The trouble sphere is | |
01:35 | the lowest layer . It contains 80% of the air | |
01:38 | on the planet . It's also where all of our | |
01:41 | weather takes place above the troposphere is the stratosphere . | |
01:44 | There's no weather up there and much less air , | |
01:47 | but there's still important gases in it that help absorb | |
01:50 | harmful rays from the sun . The mesosphere is the | |
01:53 | coldest layer of the atmosphere and sits on top of | |
01:56 | the stratosphere . There's almost no breathable air up there | |
01:59 | and even less in the thermos fear above it , | |
02:02 | where you might bump into some satellites flying around the | |
02:04 | planet . The last layer of the atmosphere is the | |
02:07 | exists fear . That's the highest you can go and | |
02:10 | still be on earth once you leave the exodus fear | |
02:14 | , you're officially in space , baby . Now , | |
02:16 | these two spheres can be kind of hard to tell | |
02:18 | apart . So let's investigate at the beach . Mm | |
02:23 | hmm . The beach is the perfect place to take | |
02:27 | a closer look at what pieces of our environment make | |
02:29 | up the hydro sphere , in which are parts of | |
02:31 | the atmosphere . The beaches of course , right next | |
02:34 | to the ocean . And since the ocean holds most | |
02:36 | of the water on our planet , it's the biggest | |
02:38 | part of the hydro sphere , The rivers that flow | |
02:41 | into the ocean are also a big part and so | |
02:43 | is the rain that's just starting to fall on our | |
02:46 | beach . Well that's a bummer , but check this | |
02:48 | out while the rain is a part of the hydro | |
02:51 | sphere , the clouds that came from our actually part | |
02:53 | of the atmosphere and the wind that pushes the waves | |
02:56 | around is part of the atmosphere , to even though | |
02:59 | we can't see it , the atmosphere is all around | |
03:02 | us in the form of the air that we breathe | |
03:08 | our planet . Couldn't be the amazing place , we | |
03:10 | know it to be without the four spheres , and | |
03:13 | it can be a tough puzzle to put together , | |
03:15 | but the result is pretty amazing . I think you'll | |
03:18 | agree . |
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