Defining Gravity: Crash Course Kids #4.1 - By Crash Course Kids
Transcript
| 00:09 | if I told you that you just won the lottery | |
| 00:12 | , what would you do if you're like me , | |
| 00:14 | you jump up and down and scream and after you | |
| 00:17 | were done freaking out and jumping in the air , | |
| 00:19 | you'd land on your feet , right ? But why | |
| 00:22 | would you land back on the ground instead of just | |
| 00:24 | floating off into space ? It's because of a little | |
| 00:31 | something we call gravity . Gravity is what pulls everything | |
| 00:34 | towards the ground , including you . Without the force | |
| 00:37 | of gravity . There would be no life on earth | |
| 00:40 | . Air water animals , everything would fly off into | |
| 00:43 | space . There'd be no , you know me know | |
| 00:46 | french fries not to think of gravity like the invisible | |
| 00:50 | super glue that holds our massive world together . You | |
| 00:52 | can't see it , but it's always there . An | |
| 00:55 | english scientist named Isaac Newton was the first person to | |
| 00:58 | seriously study gravity over 300 years ago . There's a | |
| 01:01 | famous story about him that you might have heard supposedly | |
| 01:04 | Sir Isaac was hanging out underneath an apple tree , | |
| 01:07 | thinking probably partly napping when an apple fell from the | |
| 01:12 | tree and conked him on the head . That's when | |
| 01:14 | Sir Isaac had an a ha moment . Why did | |
| 01:16 | the apple fall down to the ground and not up | |
| 01:19 | or sideways ? He realized that a special kind of | |
| 01:22 | force which we now know as gravity was acting on | |
| 01:24 | all of the objects on earth , pulling them toward | |
| 01:27 | it . Once the apple became too heavy for its | |
| 01:30 | stem to hold it anymore , the gravitational pull of | |
| 01:32 | earth brought the apple down onto Newton's Noggin . Newton | |
| 01:36 | also realized it doesn't matter how heavy an object is | |
| 01:39 | either whether you're holding an apple or a bowling ball | |
| 01:42 | or a feather , if you let go of it | |
| 01:44 | , that sucker's going down . We're going to make | |
| 01:46 | a whole video about this . Later , basically he | |
| 01:48 | determined that what goes up must come down . Sir | |
| 01:52 | Isaac was a pretty smart dude . Okay , so | |
| 01:54 | you know that if you jump up you'll eventually land | |
| 01:57 | back on the ground and you know that an apple | |
| 01:59 | drop down , we'll land on the ground to But | |
| 02:02 | what if you throw something in front of you or | |
| 02:05 | to the left or the right mm to see how | |
| 02:10 | gravity will act . Pick up the tennis ball or | |
| 02:13 | any small round object and hold it in your hand | |
| 02:16 | . Let's toss it in the air and watch it | |
| 02:18 | fall to the ground . No surprise here , Okay | |
| 02:21 | , now pick it up and hold it over your | |
| 02:23 | head , let go and watch it fall once more | |
| 02:26 | again . Not a shocker . Now throw it to | |
| 02:29 | your left ball down , pitch it to the right | |
| 02:31 | and watch it go down again . No matter where | |
| 02:38 | you throw the ball , it's going down . So | |
| 02:40 | we've determined that near the surface of the earth , | |
| 02:43 | where we all are gravity is the cause that produces | |
| 02:46 | the effect of all unsupported objects falling down . The | |
| 02:49 | ball will go up or to the left or to | |
| 02:51 | the right for a little bit , but eventually it's | |
| 02:53 | going to be pulled back down to the ground , | |
| 02:56 | no matter what gravity has got a hold on . | |
| 02:58 | Well , everything . |
Summarizer
DESCRIPTION:
OVERVIEW:
Defining Gravity: Crash Course Kids #4.1 is a free educational video by Crash Course Kids.
This page not only allows students and teachers view Defining Gravity: Crash Course Kids #4.1 videos but also find engaging Sample Questions, Apps, Pins, Worksheets, Books related to the following topics.
GRADES:
STANDARDS:
