Organizing Properties: Crash Course Kids #35.1 - Free Educational videos for Students in K-12

Organizing Properties: Crash Course Kids #35.1 - By Crash Course Kids

Transcript


00:09	have you ever thought about all the different kinds of
00:11	groups you're part of . If you consider it for
00:13	a minute , you'll find that there are probably a
00:15	lot of them and some of them are more like
00:17	than others , like there's the friends you hang out
00:19	with and your family , your hockey team , your
00:21	crash course fan club and that's just for starters .
00:24	And even though these groups are totally different in each
00:27	of them , there's something that all of its members
00:28	have in common , like your family maybe from the
00:31	same town and your friends may all be into Avengers
00:33	movies . A couple of episodes back , we learned
00:35	that all objects that is all things made of matter
00:39	have properties , qualities that make them different from one
00:42	another . Like the metal water bottle we had in
00:44	our lunch bag was a good conductor of heat and
00:46	the fruit strip was more malleable than the potato chip
00:49	. Just like groups of people have major things in
00:51	common , so do different materials instead of a love
00:54	of superheroes though . The things that these groups have
00:57	in common are properties . So how does that work
01:00	? How can we group materials by their properties ?
01:04	Mhm . You already know that everything is made of
01:09	matter . Some of the particles that make up matter
01:11	are called molecules and the particles that make up molecules
01:15	are called atoms . Now , molecules and atoms are
01:18	the smallest units of a substance . A substance is
01:21	just matter . That's all made of one kind of
01:24	atom or molecule . And since it's all made of
01:26	the same stuff , it all has the same properties
01:29	. Take water whether you have one drop of pure
01:31	water or a swimming pool full of pure water ,
01:34	the water is made of the same molecules and so
01:37	it has the same properties . So watering the droplet
01:40	and in the pool would have the same freezing point
01:42	reflectivity and so on . But wait , there's more
01:45	. If we look really closely at a water molecule
01:47	, we'll see that it's made of two other substances
01:51	. And if we have the right equipment , we
01:53	could break the water molecule down into smaller parts .
01:56	The atoms of those two substances hydrogen and oxygen .
02:00	These substances can be broken down into any other substance
02:03	. So we call them elements . Elements are the
02:06	very most basic kind of substances and they each have
02:09	specific properties . So that basically is what stuff is
02:13	made of . Now , let's see how we can
02:14	group some substances by their properties . Shall we mm
02:21	to get the substances for our experiment , we'll check
02:24	out a place that's near and dear to my heart
02:27	, the bottom of my backpack . Okay , so
02:31	it looks like we have got a candy bar ,
02:35	a safety pin , a tissue unused in case you
02:39	were wondering , a paper clip and a magnet .
02:41	Time to put these things into different groups by looking
02:44	at their properties . Let's start with transparency . Well
02:48	, since we can't see through any of them ,
02:49	we can say that none of them are transparent .
02:52	Good to know , but not really helpful in placing
02:54	these things into smaller groups . We can also see
02:57	that the safety pin and the paperclip are both made
02:59	of metal . They're pretty shiny , which means that
03:01	they have a pretty high reflectivity . Let's check out
03:04	one more . How about magnetism ? If we use
03:07	a magnet on the objects , we can see that
03:09	the safety pin and the paperclip are drawn to the
03:11	magnet and again , what do they have in common
03:14	? They're made out of metal . So at the
03:15	end of our little experiment , we have three groups
03:18	, things that have low transparency , things that have
03:21	high reflectivity and things that are magnetic . And that's
03:24	just using a few of the many properties that are
03:26	out there . Scientists use many more to organize substances
03:29	into groups by looking at these groups , scientists have
03:31	a pretty good idea about how objects made out of
03:33	those substances are going to act . So a substances
03:41	matter that is made of one kind of atom or
03:42	molecule substances have specific properties like reflectivity and magnetism .
03:47	And once a substance can be broken down into any
03:49	other substance , it's called an element and elements have
03:53	properties to We were able to group objects made of
03:55	different materials into groups based on things that they have
03:58	in common , specifically properties like transparency and reflectivity .
04:02	And we notice that there are objects that have similar
04:04	properties that have other things in common to like the
04:07	objects that were attracted to the magnet were made of
04:09	metal . So objects that have properties in common seem
04:12	to frequently be made of similar substances . And speaking
04:15	of groups that have things in common , I'm due
04:17	to meet my Peeps for a comic book movie marathon
00:0-1	.

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