Measurement Mystery: Crash Course Kids #9.2 - Free Educational videos for Students in K-12 | Lumos Learning

Measurement Mystery: Crash Course Kids #9.2 - Free Educational videos for Students in k-12


Measurement Mystery: Crash Course Kids #9.2 - By Crash Course Kids



Transcript
00:09 Have you ever gotten up in the middle of the
00:11 night to use the bathroom and stumble out of bed
00:13 and then smash . And then after that , well
00:16 that has happened to me . In fact , just
00:19 last night , got up , went to get some
00:21 water and kick something really hard and now my toe
00:24 hurts . So bear with me . But if you're
00:26 at all like me having this happened to you likely
00:28 brought a few things to your mind , like one
00:31 turning on the lights would probably have been a good
00:33 idea to what did I trip over and three who
00:37 left it there ? The second of these questions is
00:39 pretty important because it's a question that's the essence of
00:42 so much science and that is what is this thing
00:47 ? Yeah . No matter what that thing is ,
00:52 I can tell you that it's made up of matter
00:54 and all Matter has properties , specific characteristics that separate
00:58 it from other kinds of matter . If you remember
01:00 from the last episode , properties are things we can
01:02 observe and measure things like an objects length with height
01:06 and volume . But how can we use these kinds
01:08 of properties to identify an object ? I am so
01:12 glad you asked because we're going to do a little
01:14 investigation together . Mm . So today we're going to
01:20 solve the mystery of what did Sabrina trip over in
01:23 the middle of the night . And we'll do this
01:25 by examining the properties of said mystery object which I
01:29 happen to have right here hidden under the cloth .
01:31 But before we start our investigation , did you know
01:34 that there are different kinds of units that can be
01:36 used to measure things You can measure in feet or
01:39 pounds or gallons if you wanted . I guess you
01:41 could also measure in jelly beans but that would take
01:44 a long time . So we'll just go ahead and
01:47 use the international standard units , also known as the
01:51 metric system . You might know these units as meters
01:54 , grams and leaders . And the markings on my
01:56 measuring tape here , divide a meter into 100 smaller
01:59 pieces of equal size . Each of these is a
02:02 centimeter 1/100 of a meter . Okay , now ,
02:04 back to this mystery object . Feeling around . It's
02:07 got nice straight sides and two sides are larger than
02:10 the other two . That means we're dealing with a
02:12 rectangle here . Now let's give those sides of measure
02:15 looks like it's about 23 cm wide , about 30
02:18 cm tall and about five cm high . So we
02:21 have some measurements . That's a good start . But
02:24 it's not enough to tell us what this thing is
02:26 . So let's measure another property . It's mass to
02:29 do this . We need a different tool , a
02:31 scale and we'll use a different unit to . In
02:34 the metric system . The unit of mass is called
02:36 a gram . A paperclip has a mass of about
02:38 a gram , whatever this is , it's kind of
02:40 heavy . It's almost 3000 g . So here we
02:43 have an object that is pretty heavy , hard ,
02:45 smooth and rectangular . Let's see what other objects do
02:49 I know of that fit that description . Tennis racket
02:51 , nope . It's not my socks or my stuffed
02:54 panda . And we've already ruled out my tablet .
02:57 Oh , I know it's my science book . I
02:59 was doing a little reading last night and put it
03:01 on the floor before I turned the lights out .
03:07 So we've been able to identify a mystery object by
03:10 observing and measuring its properties . We used units in
03:13 the metric system to put values on properties such as
03:16 grams for mass and centimeters for length , width and
03:19 height . And those numbers gave us enough clues to
03:22 solve the mystery of what I kicked in the dark
03:24 . So remember when it comes to measuring , think
03:26 metric , and when it comes to identifying objects ,
03:29 take a tip from me , avoid identifying them with
03:32 your toe .
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Measurement Mystery: Crash Course Kids #9.2 is a free educational video by Crash Course Kids.

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