Part(icles) of Your World: Crash Course Kids #3.2 - By Crash Course Kids
Transcript
| 00:09 | You ever hear someone say you look like $1 million | |
| 00:12 | . Well you do but you also look like a | |
| 00:15 | million particles . Let me explain . You and I | |
| 00:18 | are both made of matter . I don't mean we | |
| 00:20 | matter like were important even though of course we are | |
| 00:23 | . I mean we actually are matter matter as you | |
| 00:27 | know is anything that has weight and takes up space | |
| 00:30 | and we did a whole video about it . But | |
| 00:32 | what is matter made of ? It's made of particles | |
| 00:40 | . So you as a big thing a matter are | |
| 00:43 | made of particles . The device you're watching this on | |
| 00:46 | is made of particles . Your dog is made of | |
| 00:50 | particles . You get the idea particles are so tiny | |
| 00:54 | though you can't see them . Just picture them as | |
| 00:57 | super small balls packed together to form an object and | |
| 01:00 | how an object looks and behaves . Which we call | |
| 01:02 | its properties has a lot to do with those tiny | |
| 01:05 | particles that it's made of . Let's take a look | |
| 01:10 | mm You know that most matter comes in three states | |
| 01:14 | , solid liquid or gas particles in a solid are | |
| 01:18 | packed so tight that they don't move and they keep | |
| 01:20 | you from moving through it like a brick wall . | |
| 01:23 | Now don't try running through a brick wall . Just | |
| 01:25 | trust me on this . But in a liquid , | |
| 01:27 | there's more space between the particles that extra room between | |
| 01:30 | them allows them to slide around . That's why you | |
| 01:33 | can stick an object into or through a liquid like | |
| 01:36 | dropping a straw and a glass of soda or waiting | |
| 01:38 | through a pool of water . And there is so | |
| 01:40 | much space between the constantly moving particles in a gas | |
| 01:44 | that you can move around in them easily . In | |
| 01:46 | fact , when you walk from one side of the | |
| 01:48 | room to the other , you walk through a bunch | |
| 01:50 | of gases that make up air . But if something | |
| 01:52 | is a solid , will it always stay a solid | |
| 01:55 | ? Is a liquid always a liquid . Do gases | |
| 01:58 | ever become non gases ? To find out If matter | |
| 02:00 | can change states . Let's find examples of when objects | |
| 02:03 | properties change . Then we can figure out what's happening | |
| 02:06 | to their particles . Here's one a candle . It's | |
| 02:09 | solid , right ? Made of wax . But when | |
| 02:11 | you light the candle , the packed particles loosen up | |
| 02:14 | and the wax begins to melt liquid wax so a | |
| 02:17 | solid can become a liquid . Now here's another , | |
| 02:20 | let's say you've got a pot of water on the | |
| 02:22 | stove . If you heat a liquid up , its | |
| 02:24 | particles will move around so fast that they can't hold | |
| 02:27 | onto each other . When that happens , all of | |
| 02:29 | the particles fly apart and become a gas , like | |
| 02:32 | the steam . You see when you boil water so | |
| 02:34 | a liquid can become a gas . Okay , one | |
| 02:37 | more . How about a forest on a really cold | |
| 02:40 | night or even on your front lawn ? When it's | |
| 02:42 | cold enough water vapor , a gas in the air | |
| 02:45 | turns into tiny crystals of frost , which you see | |
| 02:47 | on trees or grass . The free floating particles in | |
| 02:50 | the gas join together and form a solid around the | |
| 02:53 | plants so a gas can become a solid . But | |
| 02:56 | my favorite example of a state of change , the | |
| 02:58 | Wizard of Oz , definitely remember when the Wicked Witch | |
| 03:01 | of the West melts at the end , She totally | |
| 03:04 | goes from a solid to a liquid . Okay , | |
| 03:06 | but seriously , what does all of this mean ? | |
| 03:13 | An object made of matter can change its properties when | |
| 03:17 | it changes states . And remember it doesn't make a | |
| 03:19 | difference which state of matter an object is in solid | |
| 03:22 | liquid or gas , It's still always matter to sum | |
| 03:26 | up . Matter is everywhere . Matter is made of | |
| 03:29 | particles . Therefore particles are everywhere . So like I | |
| 03:33 | always say never trust a particle . They make up | |
| 03:37 | everything |
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Part(icles) of Your World: Crash Course Kids #3.2 is a free educational video by Crash Course Kids.
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