Science 3: Greenhouse Gasses
They aren't green, they don't come from greenhouses, so why do we call them greenhouse gases? Well, we're not going to give it away in the description. What do we look like? Answer giver awayers? Nope. That's not even a thing.
|Elementary and Middle School||3rd Grade|
Everything that moves or grows runs off of some sort of energy.
Seems like the only thing in the world that doesn't need energy is a toddler... [Man on the floor and toddler on his back]
Seriously, how do they do it…?
We're tired just watching them…
Unfortunately, certain kinds of energy can have some negative consequences.
One of the biggest consequences?
Way, way too much greenhouse gas. [Pollution appearing from factory]
Take a look at this planet.
There's a pretty good chance you might recognize it…after all, it is your home.
And if it's not your home, then cool! [Spaceship appears by Earth]
We're flattered you decided to spend your time on earth watching our videos, you cool
Now let's zoom in a bit.
This is Earth's atmosphere.
Greenhouse Gases is a phrase used by scientists to describe some of the gases within the earth's [Coop discussing greenhouse gases]
Which ones, you ask?
The ones that have a warming function, such as carbon dioxide and chlorofluorocarbons.
We swear, we didn't make that last one up…but yes, it does sound like something straight
out of a super hero comic.
Greenhouse gases like those trap heat from the sun and keep things nice and toasty by [Arrows trapped inside earths atmosphere]
reflecting the rays of the sun back and forth between the atmosphere and Earth.
Normally you hear about how bad these are, but they aren't all bad.
After all, without them, Earth wouldn't be warm enough for us to even live here.
These greenhouse gases are what make Earth such a great place for life to…y'know…live. [Man protesting and walks away cold]
But here's the problem....
Over the past 150 years, the amount of Greenhouse Gases in the Earth's atmosphere has increased
by a whole lot.
And now things are a little out of balance.
But how did that happen?
Was it all part of some super evil alien plan??
Sorry, alien friend.
We forgot you were there…ahem.
It's actually because of that pesky old energy thing we were talking about earlier. [Gas blowing out of an exhaust]
See, for a lot of our energy, we burn something called fossil fuels – y'know, like gas,
coal and oil.
And when you burn fossil fuels, they release carbon dioxide into the air.
Scientists believe that it's all this fuel burning that's causing the average global
temperatures to rise. [Fuel burning and thermometer rising]
So what's a planet to do?
Obviously we're not exactly ready to just give up energy altogether...
We need our cars for awesome road trips...
And our blenders for awesome milkshakes... [Boy with a milkshake]
And TVs and motor boats and cell phones and Laser Tag and roller coasters and those weird
massage chairs they have at the mall, and a million other things that require some form
We can't just give up all of that nifty stuff, can we?
Of course not.
That'd be barbaric. [Cows in a field]
Which is why for years now, people have been creating and experimenting with alternative
sources of energy...
We're using things like solar energy, which is when we harness the power of the sun's [Dino discussing alternative energy solutions]
rays, just like Superman, to create energy.
This is done either by using solar panels that convert sunlight directly into energy,
or by using the heat from the sun to heat up fluid enough to create steam, which then
powers a generator. [Large solar energy panels]
There's also wind power, which uses the power of the wind to blow big turbines around and
around, generating electricity that way.
And we even have hydroelectricity, which is similar to wind power, but instead of using
wind to spin the turbines, it uses the flow of water to do it!
By shifting to these forms of alternative energy, we're able to burn less fossil fuels,
create less greenhouse gas, and hopefully reduce the effects of climate change. [Coop explaining benefits of alternative energy]
Now if only we could somehow figure out a way to harness the power of children after
they've eaten two slices of birthday cake. [Child bouncing up and down at birthday party]
Just think…we could get rid of power plants altogether.