00:01Oh, hey, hi. I'm Crazy Chris, and welcome to So Cool Science.
00:06Science you can do right at home.
00:09I'm just hanging out on planet Earth and going over today's science file.
00:13How did the Earth form?
00:18I get asked that a lot, and my answer is...
00:21Try this.
00:26You will need a container, some tape, some rocks, and a plastic bag.
00:32Okay, first, you're going to want to get yourself a container of some sort.
00:36Ha-ha!
00:46Oh.
00:48Next, you're going to want to get yourself some pebbles.
00:50I know just where you get some, too.
00:53Hee-hee!
00:54Oh, phew.
00:55I thought there was something on the bottom of my shoe.
00:57The pebbles are right here.
00:59Ha-ha!
01:00Woo!
01:01And the final ingredient...
01:07A plastic bag.
01:09And now, you're ready to construct your model.
01:24Now, take a big rock and place it in the center.
01:29And drop it in the center.
01:31Whoa!
01:32Woo!
01:33Center!
01:39Make sure that when you drop the rock in, that there's a bit of a well in the plastic.
01:43This well is what's called a gravitational well.
01:47All right, now get yourself a handful of rocks.
01:49And start dropping them all the way around the outside of the well.
02:02So, how is this?
02:03Like the formation of the Earth?
02:05Well, take a look at this.
02:07Scientists believe that the Earth, Sun, and all the other planets and moons in our solar system formed about 4
02:13.6 billion years ago.
02:15These all form from a giant cloud of gas and dust known as a solar nebula.
02:19Notice how gravity pulls the smaller rocks towards the bigger rock in the center.
02:23The Earth formed due to a force of gravity.
02:26Small clumps of the rocky material eventually came together with the dust in the original solar nebula to form protoplanets.
02:34These protoplanets broke apart, reformed, until they became the four inner rocky planets.
02:41So, now you know how the Earth was formed.
02:44Think of all the awesome things that the Earth has to offer us.
02:47Ah, trees.
02:49And, ah, water.
02:51And rocky land.
02:53And, ah, air.
02:55Ah, achoo.
02:57Keep in mind that this is the only planet we know of currently that can support life.
03:02And that is why science is really, really cool.
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