yego.me
💡 Stop wasting time. Read Youtube instead of watch. Download Chrome Extension

Photosynthesis in ecosystems | Middle school biology | Khan Academy


2m read
·Nov 10, 2024

When you look at a rain forest ecosystem like this, one of the obvious questions may be: where do these plants come from? How do they grow? They're growing all the time, getting larger and larger and larger. Where does that mass, where does that matter come from?

Pause this video and think about that. Well, you might already be guessing where it comes from. It might have something to do with photosynthesis, which we go into a lot of depth in other videos. But this is a process where you have carbon dioxide from the air in conjunction with water that primarily is coming from the soil.

It uses energy from the sun, so I'll just draw that as these yellow squiggles coming from the sun. In order to do two things, the plant is going to be building itself using the matter and the carbon dioxide in the water while also expelling oxygen as a byproduct.

This matter that the plant is able to take from its environment with photosynthesis is used to both become the structure of the plant and a store of energy in the form of sugars. Now animals like you and me, we get our energy by then eating these plants.

And how do we unlock that energy? Well, that's where this oxygen is really useful. That's why we need to breathe oxygen. Because by breathing the oxygen, we can essentially do photosynthesis in reverse, and we can break down this matter, these sugars that we're getting from plants.

So all of this biomass is coming from essentially water from the soil and carbon dioxide, and energy from the sun is used to essentially put it together. There might be a few other nutrients that are also coming from the environment like the soil, but primarily the water and the carbon dioxide.

More Articles

View All
Current market conditions in corporate aviation.
[Music] I was going to hit that peak next year. Do you expect the demand to remain? If you got that report just the other day, maybe it was delivered to you by horse, because that information is old and it’s not true. The industry probably hit its peak, …
Heat transfer and thermal equilibrium | Thermodynamics | AP Chemistry | Khan Academy
Let’s see. We have two samples of helium gas. One sample of helium gas is at temperature t1, and the other sample of helium gas is at temperature t2. If t2 is greater than t1, that means, on average, the particles of helium gas in the second box are movin…
Around the World on Sun Power | Origins: The Journey of Humankind
Where you are going is just as important as how you plan to get there. As we look forward to new frontiers here on Earth and beyond, places where resources may be scarce or non-existent, we need to look for new ways to carry ourselves beyond the horizon; …
Mesh current method (step 4 solve)
We’re working on the mesh current method of analyzing circuits, and in the previous video, we set up our circuit. We set up our mesh currents flowing around these loops within the circuit, and we solved for the easy currents. That was the, uh, the current…
The fastest way to ruin your entire life
Here’s another quick tutorial on how to ruin the rest of your life. Step one: Close your body language. Go throughout life with a closed body language. Slouch your shoulders, keep your head down, don’t make eye contact. Don’t give anybody the impression …
Laura Overdeck on reducing math anxiety and connecting math with real life | Homeroom with Sal
We’re seeing questions come on YouTube, uh, ask Laura and I anything, and we have team members who are looking at them, and we’re going to surface, uh, them. And actually, I’ll start with a question from YouTube, and that did help. Thanks, Laura. So this…