Biology I - Magic School Bus - Gets Planted! [Introduction to Photosynthesis]

Zoom in Liz. Guys, where are you? We're right here Phoebe in a root of the plant. Is it just me? Or is there nothing that looks like food out there? You're right, Ralphie. There's just water. Sorry, bieb looks like plants get water from the soil. Not food. And how to plants get their food. I let anyone see me like this. Thanks, Liz. Phew. Now where are we going? I wish I knew. Hey, we're starting to go up. Wait a minute. I know where we are. We're in the stem. Okay, we came in the roots and I was shooting up to the stem. Still no food source anywhere. So the only place we haven't checked out is the leads. And you won't get permission to make that omission from this expedition. Class, prepare for a totally tubular experience, okay? What going faster? Phoebe, you all right? Baby. I'm so hungry. I feel weak. Hang in there, feed. We're getting somewhere. Top floor. These. Oh, good. Leave. She's fading fast. Puerto Rico is so thin. How can there be any food in here? Well, we know the plane doesn't get its food through its roots or stem. 

So the answer's got to be somewhere in this leaf. Wow. This is beautiful. Is this really the inside of a leaf? It's not flat or thin. The leaf seems thick because we're so tiny. And look, look at all these different parts. You can't tell a leaf by its cover class, leaves look a lot different from the inside out. I bet it's these dark green blobs that make the leaf look so green. Absolutely Carlos, and these gorgeous green blobs are called chloroplasts. Are they food? No. But you're getting warm. Then there's no plant food around here either. Wait a minute, down there. That'll winning. Maybe who comes in that way? Some things coming in when those holes open up? But is it food? I'm a food expert. I'll give it the old sniff test. Nah, it doesn't smell like anything edible. Help. Oh, just what I needed. A breath of fresh air. You're right it is air, the leaves are bringing in fresh air. How? Thank you for flying leaf air express Ralphie. Okay, so plant sucking air through those openings in their leaves. And they suck in water through the roots and up their stems. 

But what does that have to do with getting food? And if we don't find out so hungry. Don't give up. We're making progress. We really are. Think about something else. Think about the weather. The weather? Sure, it's my home to clear up soon. Yeah, look, here comes the sun. It's shiny right into the sleeve. Wow, look at those chloroplasts glow. Yeah. The whole place is really perked up. Something's making all those chloroplasts move to the top of the leaf. But why? What's going on? Well, I Arnold put a cherry query to the chloroplasts. Don't be shy. Just push right on in class. Here we go. Gotcha. Yo, the chloroplasts are sun freaks. The heavy for the sunlight. That's right, Wanda. They are experts at catching the sun's rays. Their actually soaking sun in. And the sun seems to give them energy. But the chloroplasts are taking in more than sun. They're taking an air and water too. And they're using it to make stuff. Maybe it's some kind of recipe. 

Take air, water, and sun, mix it together and out comes what? Yum. This way stuff is all gooey and sticky. We got into my mouth. Hey, this stuff is sweet. Not bad. Mmm. I was just wishing I had a snack, but who knew I'd get one here? It's sweet. So that means the chloroplasts are making some kind of sugar. And sugar is a kind of food. So maybe the sugar is food from a plant. Which means plants don't get food from somewhere else. They make their own. Oh, yes. The sweet taste of discovery. Phoebe, Stevie. That's the baby. Baby, we figured it out. Plants don't get food from someplace else. They make their own. Did you see all it takes is ear, water, and sun. I saw the make your own food. And growing tour magic beanstalk quick. I would if I could, but I can't. I've got water and air. But there's no exception this box