Name: Build the Best Solar Oven Ever! | Engineering Project
Uploaded: 2021-02-23T00:58:54.000Z
Duration: 5 min 11 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

Hi, everyone! Squeaks and I have a problem.

We were about to start  cooking lunch, but then we saw

that it's the perfect day to be outdoors.

We're trying to figure out how we can cook

Solar ovens are a lot like kitchen ovens.

They're basically boxes that heat up inside,

and that are great at keeping the  heat trapped inside of the box.

If you put food inside of the  oven, the heat cooks the food.

Well, kitchen ovens use electricity  or burn gas to make themselves hot.

A solar oven uses solar energy  — or energy from the Sun!

When light from the Sun shines into a solar oven,

This means they're perfect for cooking outside!

You can make a solar oven using  materials you might already have.

Hey, Squeaks — will you help me design our oven?

First, we have a pizza box to  use as the main box of the oven,

Tin foil is a great insulator, or  something that's great at trapping heat.

So, it can help us to keep  the heat inside the box.

I'll cover the inside of the box  with tin foil, and tape it down.

Hm, now, we have our first design challenge.

We need sunlight to get into  our box, but if we open the box,

Is there something that we could  change about our box to get

sunlight in, while still keeping the box closed?

It will be like how windows can  let sunlight into a building,

I'll make a flap, so we can  open and close our “window.”

And kids, make sure that  when you're cutting your flap

Normally, windows use glass to  separate the inside and outside.

We want something clear like  glass, that will let sunlight in,

but that doesn't break as easily.  What do you think we should use?

We can cover the window in plastic  wrap, and tape it around the edges

Now sunlight can get into the  oven, and heat up our food!

Uh-oh… I think there's another  problem with our design.

The only sunlight that can  get into our box is the light

How can we get more light into our solar oven?

I've got an idea! Did you know light can bounce?

If you shine a flashlight in a  mirror, the light will bounce off it

And it does this on more than just mirrors!

Anything with a shiny surface can  make light bounce, or reflect.

So if we want to reflect some  sunlight into our solar oven,

The tin foil! The tin foil is very shiny!

We can try using that to reflect  the sunlight into the box.

I'll tape some tin foil to the section  of lid we cut out to make our window.

If we angle this just right, the  sunlight aimed at the tin foil

should bounce off of it and  shoot straight into our oven!

We can use this pencil to hold  that lid at the right angle.

Next, we'll put the food  on a plate inside to cook.

That leaves us with our third  and final design challenge:

We have a bunch of paper plates  from Sam the Bat's birthday party.

The colors matter because dark  colors heat up in the sunlight

You might have noticed this if  you've ever worn a dark shirt outside

We probably want a dark-colored plate to help us

I agree, let's use the black  plate. That one is darkest.

It looks like we're ready  to test out our solar oven!

We're going to head outside  to test our solar oven.

Depending on what happens, we  might make changes to our design.

Maybe we'll paint the entire  inside of the oven black,

or find a shiny mirror to help  reflect more sunlight into the window.

What ideas do you have to make our oven better?

Ask a grown-up to help you to build  your own design, and test it out!

And if you'd like to keep  exploring with me, Squeaks, Jessi,

and the rest of our friends,  hit the subscribe button.

We'll see you next time here at The Fort.

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Build the Best Solar Oven Ever! | Engineering Project

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