Remember when we were putting together the puzzle that is our life that hates use i know mayir. Using the four spheres as giant pieces Well, we got pretty far last time, but we’re not done yet. Oh, no That’s because in addition to the geosphere and the biosphere which we talked about last [time] there are [two] more spheres that we need to Complete our planetary puzzle are the hydrosphere and the atmosphere so without further ado. Let’s dive in See what I did there. I said that because the first sphere we’re going to talk about is the hydrosphere Hydro comes from the greek word [for] water and all of the water on [Earth] is in the hydrosphere This means that every single drop of [saltwater] in the oceans But also all of the fresh [water] in lakes and Rivers is in this sphere And it includes all of the water trapped in glaciers as ice and the water held deep underground Now there’s also water in the air around us to which we can sometimes see in the form of rain and snow Those things come from clouds which happen to be way up in the atmosphere [our] last but certainly not least Sphere this sphere contains all of the gases on the planet which is fitting since atmos comes from the Greek word [for] air although we can’t really see the atmosphere or grab onto it it reaches everywhere and covers the entire Planet like a giant snuggly Blanket, but our atmosphere blanket isn’t all the same It’s split up into many different layers the troposphere is the lowest layer it contains 80% [of] the Air on the planet It’s also where all of our weather takes place above the troposphere is the stratosphere There’s no weather up there and much less air But they’re still important gases in it that help absorb harmful rays from the sun the mesosphere is the coldest layer of the atmosphere and sits on top [of] the stratosphere There’s almost no breathable air up there and even less in the thermosphere above it Where you might bump into some satellites flying around the planet the last layer of the [atmosphere] is the exosphere That’s the highest you can go and still be on Earth once you leave the exosphere You’re officially in space baby now these two spheres can be kind of hard to tell apart so let investigate at the Beach The Beach is the perfect place to take a closer look at what pieces of our? Environment make up the hydrosphere and which are parts of the atmosphere [the] Beach is of course right next to the ocean and since the ocean holds most of the water on our planet [it’s] the biggest part of the hydrosphere the rivers that flow into the ocean Are also a big part [and] so is the rain that’s just starting [to] fall on our beach Well, that’s a bummer But check this out while the rain is a part of the hydrosphere the clouds it came from are actually part of the atmosphere And the wind that pushes the waves around is part of the atmosphere too even though. We can’t see it The atmosphere is all around us in the form of the air that we [breathe] Our planet couldn’t be the amazing place We know it to be without the four spheres and it can be a tough puzzle to [put] together But the result is pretty amazing. I think you’ll agree Be sure to subscribe for more from Crash Course kids!