Water Experiment

When we did the water experiment, we learned some things that we might not of known even existed if we hadn't done this lab. Who would of known you can take a cup of water and transfer the water down a string to another cup? That just blew my mind! We also learned some really cool words while we did the lab. The words we learned were adhesion, cohesion, and hydrogen bond. When the water was being transferred down the string, it was adhesion and cohesion because adhesion means the object sticks to another object. It was cohesion because that means the object stuck to itself. As you can see, these both fit with this part of the experiment. When we did the wax paper experiment, I actually think that was a hydrogen bond. The wax paper wouldn't let the water sink in, so the water droplet just stayed on top of the paper. If you took a stick to the drop you could actually move it across the paper. The next experiment we did, we put as many drops of water as we could on the top of a penny until it ran over the sides. I think this was also a hydrogen bond. I think so because when the water finally reacted with the air, the water spilled over the side of the penny.

     Next, we will talk about how trees get water. I think this is just like the string experiment because the water is being transferred down the tree after the water hits the top. Therefore, I think this is a great example of a cohesion and a adhesion bond. The tree has veins and roots which help transport the water down or up the tree so the whole tree can get the amount of water it needs to so it can stay alive. That's pretty much all i can explain about cohesion and adhesion, here are some pictures so you can kind of get a better understanding.

Adhesion Bond

Cohesion Bond

Hydrogen Bond