Transpiration: Concept
As seen in Photosynthesis, leaves need water to survive. But how do they get that water? Most people answer "from the roots, because there's water in the soil," and that's true, but why can water defy gravity and travel upwards the the leaves?
This process is known as Transpiration, but before we get to that, let's look at this first:
Remember these? Well, these are like syringes, and their mechanisms are pretty much like Transpiration. When it isn't loaded, there is a big piece of plastic tube that fills the empty space so nothing can get in. What happens when you want to attack your friends or "reload"? You pull back the pump and water rushes in, filling the empty space with aquatic ammunition. Why does this happen? Because once the pump is pulled up, an empty space, or vacuum, is created: there is no air or anything particle inside pushing outwards, but atmospheric pressure still exists, so the water gets in through the hole. In simpler terms, water (or any fluid or gas) replaces the empty space in any complete tubing or container. This is also like sucking up soda through a straw, but I'll leave that to your imagination, because this concept is going to be relevant in another thing about transpiration.
