The Understanding of H2O

Yesterday and the day before we did experiments on water. A couple of experiments we did were seeing how many drops of water from a pipette we can hold on a penny. Another experiment we did was connecting a string to 2 beakers, one with water and one without, then trying to move the water from the full beaker to the empty one with a string. The group in our class that transferred the most water with the string used 16.9 ft of string.

Did you know that all living this are made up of 70% to 90% water? Water is a substance that has a high heat capacity. I learned a lot about how water is one of the only substances that expands when it freezes. This is because when the molecules of water, 2 hydrogen molecules and 1 oxygen molecule, freeze they are shaped weird so they have trouble sticking together. Water is a polar molecule. It lets hydrogen atoms collaborate within water atoms. This is how living things exist and can carry on cellular properties. Water is a very neutral molecule because it is made of an H+ atom and a OH- atom and a positive and a negative connect.

Starting to understand a little more.

People are different than plants in a lot of obvious ways like the fact that people have brains and you have to do different kinds of experiments to find different things. Plants however need different things that humans need to survive. Today we had to find out a little bit about different kinds of variables such as independent and dependent variables. We did a online experiment that I couldn't understand so I looked up the definitions of the following words.

So the independent variable is the one that stands alone and the dependent variable depends on the independent variable. The dependent variable responds to the independent and its creates the results in the experiment. These results can be recorded so you can compare or show the data you recorded. The experiment can have many different trials and thats when you can show what you observed.



Controlled experiment


I looked at a couple different web sites