>> Rachel: Welcome back. You're just in time for more Chompers, your morning and night toothbrushing show. 

It’s Nature week, and tonight we’ve got more riddles!

Start brushing on the top of your mouth on one side, and make sure to brush the molars in the way back. 

>> Kids: 3, 2, 1 brush!

>> Rachel: Here's your riddle: 

I can be both grey and blue

Just look up -- you’ll see

White and fluffy puffs above

And airplanes glide through me.

What am I? 

>> KIDS: The sky!

>> Rachel: Why is the sky blue?  Because of earth’s ATMOSPHERE. The ATMOSPHERE is the part of our planet that’s not the ground … but also not SPACE! It’s sort of like the gassy outer layer of our planet.

Switch your brushing to the other side of the top of your mouth (SFX), and brush those front teeth too.

The light from the sun has to pass through the atmosphere to get to us here on earth. You know how when you look through sunglasses things can look like they’re a different color? The atmosphere is kind of like the earth’s sunglasses. So when the sun’s light goes through earth’s atmosphere those “sunglasses” make the sky look blue.

Switch to the bottom of your mouth, and make sure to get the inside, outside, and chewing side of each tooth. 

Here’s your next riddle: 

I can be light and fluffy

Or dark and full of rain

You see me floating in the sky

And fly past me in a plane

What am I?

>> KIDS: Clouds!

>> Rachel: Have you ever seen a cloud that looks like a big, fluffy marshmallow? Those are called Cumulus clouds. 

I’ll tell you more, after you switch to the other side of the bottom of your mouth, and keep brushing!

Clouds come in all shapes and sizes. Big, fluffy pillow clouds are CUMULUS clouds. Thin, wispy clouds are called CIRRUS clouds. And NIMBUS clouds bring rain.  

That’s it for Chompers today, come back tomorrow for more nature, and don’t forget to- 

>>Kids: 3 - 2 - 1 spit!