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  • [♪ INTRO]

  • Hi there!

  • We were just about to head over to a nearby hill

  • to draw some of the beautiful flowers that we can see from there.

  • Squeaks went to grab his crayons, and he should be back any minute.

  • Oh, what's wrong, Squeaks?

  • [Squeaks squeaks]

  • Oh, I see.

  • Squeaks is running a little low on his crayons.

  • We've been doing a lot of coloring lately, and it looks like

  • all of his crayons are kind of worn down.

  • It makes them a little hard to hold...and really hard to use!

  • So, he thinks it might be time to toss them out.

  • Hey, I have an idea!

  • Instead of throwing these old crayons away...why don't we recycle them?

  • Recycling means taking something we would normally toss

  • into the trash and turning it into something new.

  • And it's a really simple way to help the Earth!

  • [Squeaks squeaks]

  • Good question, Squeaks!

  • Recycling is a good way to help the Earth because of what happens

  • to trash after it leaves our homes.

  • A lot of the stuff we throw into the garbage ends up

  • in what's called a landfill.

  • We use landfills to keep a community's garbage in one area.

  • [Squeaks squeaks]

  • Yep, landfill is another word for a dump.

  • Now, after a while, some of the trash that's in a landfill breaks down,

  • which means it crumbles into smaller pieces

  • and gets eaten by critters like worms that live in the dirt.

  • Food scraps like apple cores usually break down in a few months,

  • and just become part of the soil.

  • But plastic bags take a lot longer.

  • It takes 10 to 20 years for them to break down.

  • Cups and other things made out of Styrofoam can take hundreds of years!

  • And some things...like glassbasically don't break down at all.

  • They turn into smaller and smaller pieces, but they don't get eaten.

  • So they basically just stay there forever.

  • And that means garbage piles keep getting bigger and bigger!

  • The problem isthere's only so much room in every landfill.

  • When one gets full, we need to make a new one.

  • But when we make new landfills, we sometimes end up taking up space

  • where animals and plants are already living.

  • And that's not good for them!

  • That's where recycling can help!

  • A lot of our trashlike paper, plastic, metal, and cans

  • can get turned into new things that people can use again.

  • That keeps them out of the landfill.

  • So when you put trash like this into a recycling bin

  • you're doing something simple to help the Earth.

  • And I know a way we can recycle our leftover crayon pieces!

  • Okay, Squeakswe're going to keep our old crayons out of the landfill

  • by turning them into new crayons!

  • If you decide that you want to try this

  • you definitely want to get some help from a grownup.

  • You'll only need two things: your old crayons,

  • and some kind of bakeable mold to shape the new crayons in.

  • Okay, the first thing we need to do is take off

  • any paper that might be around the crayons.

  • And now, we're ready to put them in our mold.

  • We need to make sure that the mold can take a little heat

  • because we're going to put it in the oven set to a low temperature:

  • like 80°C, or for our US oven, 170° Fahrenheit.

  • Let's make some that are all one colorand some that are two colors.

  • And then we put them in in the oven!

  • And now, we'll need to wait for 8 minutes or so.

  • While we wait...I have a question for you!

  • What do you think is going to happen when we heat the crayons?

  • [Squeaks thinks]

  • I'll give you a hint: what happens to ice when it gets warmer?

  • [Squeaks squeaks]

  • Right, it melts!

  • And when it melts, it changes shape.

  • It changes from a solid piece of ice that we can hold in our hand

  • ...into liquid water that's easier to hold in a cup.

  • Both the ice in our hand and the water in the cup are made

  • out of the same stuffwaterthey just look different.

  • Well, wax, the stuff that makes up crayons, also melts

  • when it gets too warmwhich is why we put those crayon bits in a mold,

  • which will act like a cup when they turn into a liquid.

  • There is one big difference between ice and our crayons, though

  • it takes a lot more heat to melt wax than it does to melt ice!

  • Which is a good thing, otherwise crayons would melt in your hand!

  • Oh look!

  • It's time to check our crayons!

  • Ooh, check it out...they're all runny.

  • They're still the same color they were when we put them in

  • the mold...but they definitely look different than they did

  • before we heated them.

  • Now, we'll let them cool...and see what happens.

  • Hmm

  • Let's guess what will happen while we wait for them to cool!

  • What happens if we take water from melted ice

  • and put it back in the freezer?

  • [Squeaks squeaks]

  • Yep!

  • It turns back into ice.

  • So do you think the same thing

  • will happen with our crayons?

  • [Squeaks squeaks]

  • I think so, too.

  • But let's see!

  • Look, once the wax got cool, it got hard again.

  • They feel just like our old ones!

  • And let's see

  • Yep, it works just like our old ones, too.

  • We successfully recycled them!

  • And not only did we keep some possible trash out of the landfill

  • we also learned some cool science!

  • Come on, Squeaks, let's get coloring!

  • Thanks for joining us!

  • If you want to keep learning and having fun with Squeaks, me,

  • and all our other friends, be sure to hit the subscribe button,

  • and we'll see you next time here at the fort!

  • [♪ OUTRO]

[♪ INTRO]

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B2 中高級 美國腔

回收旧蜡笔!地球日活动(Recycling Old Crayons! An Earth Day Activity)

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    joey joey 發佈於 2021 年 05 月 07 日
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