5a. To “suck” soda through a straw you are pulling the liquid into your mouth by sucking. However, you cannot suck a liquid. When someone “sucks” soda through a straw, the pressure of the soda pushes the soda up through the straw and into the human mouth. The higher pressure outside of the straw and the soda seems to push the soda up the straw making us “suck” it out.
5b. The pressure fountain demonstration in class was about air pressure principals. The higher pressure bottle forces the water up while the water from the inside of that bottle starts to drain out of one and the other line from the other container of water pressure built up and fills the lower pressure bottle. One fills as the other drains as if it is a pump. It gets going once the cold water touches the glass, this happens when the bottle cools down faster which causes pressure inside to decrease faster.
Links:
https://www.education.com/activity/article/Make_a_Fountain_first/
- This link teaches you how to make your own fountain with young children. I thought it would be good since I am a Elementary Education major.
http://www.abc.net.au/science/articles/2012/11/14/3631891.htm
- This link is another pressure fountain link, it’s different because they use blue coloring to show the cold water
http://www.scienceclarified.com/everyday/Real-Life-Physics-Vol-2/Pressure-How-it-works.html
- This link shows how pressure works, different forces, and how to calculate it.
https://www.thoughtco.com/definition-of-pressure-in-chemistry-604613
- This link defines pressure and gives examples of how it is used in science.
