Judul : how to make a paper snowflake
link : how to make a paper snowflake
how to make a paper snowflake
squeaks and i are exploring! we’re looking for insects! we know that some insectsmake their homes under rocks. so we’re trying to turn over a couple ofthese rocks to see what we can find! but they’re really big and heavy, and
how to make a paper snowflake , we can’t get either of them turned over. there has to be something we can do. great idea, squeaks! a few weeks ago, we used a tool called a rampto help us do work.
a ramp, which looks a lot like a slide, isone kind of simple machine. like all machines, a simple machine is justsomething that makes work easier. that ramp sure helped us move those booksinto the house! and there’s another simple machine thatwe can use to help us to turn over those rocks! this one is called a lever. a lever basically looks like this: a longbar that's balanced on something underneath. and that something is called a fulcrum. by pushing down on one end of the lever, thefulcrum makes the other end go up. just like a see-saw at the playground!
it’s just a long bar, that’s balancedon a fulcrum. levers make work easier, by helping uslift things that would be too heavy to lift on our own. if squeaks hops on the low end of the seesaw,and i push down on the high end, the lever moves on the fulcrum, and i can lift squeaksup. it’s a lot easier for me to lift squeaksthis way, than if i tried to just pick him up. our simple machine made my job easier! so let’s use a lever to see if it can helpus lift up these rocks! alright, we’ll put one end of the lever under theedge of this first rock.
next, we’ll use this smaller rock as ourfulcrum, and put it under the middle of the lever. now we can push on the high end of the leverand the rock goes up! look we did it! but it was still kind of hard. i wonder if there’s something we can doto make the job even easier? let’s try something a little different forthe second rock. this time, we’ll put the fulcrum closerto the rock we want to lift. let’s set up our lever, give the high enda good push down, and... bingo! that was a lot easier.
for levers like this one, the closer the fulcrumis to the thing you want to lift, the easier it is to lift it! and that’s what makes a lever a kind ofsimple machine! even though it’s super-simple, a lever helpsus do work! levers are everywhere, and they sometimesdon’t look much like a see-saw, or even like the lever we used to lift our rocks. for example, did you know that when you usea wheelbarrow to carry something, you’re using a kind of a lever? it’s true!
the wheel of the wheelbarrow acts as the fulcrum,and instead of pushing down on the handles, you pull them up to lift what’s inside! we use levers to open bottles, too, and todig in our gardens, and even to eat our food! we’ll be back soon with more simple machines,but in the meantime, squeaks and i have some insects to find! thanks for joining us on scishow kids! do you have a question about machines, or insects,or anything else at all? ask a grownup for help, and leave us a commentbelow, or send us an email to kids@thescishow.com! and we'll see you next time!
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