Activity 1

In this experiment I will be working with water and different temperatures to answer the following classes.

1. Does hot water or cold water freeze faster?
2. Does hot water or cold water boil faster?
3. Does salt water freeze faster or slower than regular water?


1. Pictures of your experimental materials and setup.
         Materials Used:
            1 cup measuring unit
            2 pots for boiling water
            Salt
            1 teaspoon
            4 cups labeled

2. Your hypothesis to the questions posed.
        In this experiment the cold water will freeze faster do to the rate the molecules are moving and the temperature farther from the boiling point.
        The Hot water will boil faster do the speed the molecules are moving and the temperature being close to boiling point.
       The regular water will freeze faster than salt water.

3. Data in the form of a graph or table/4.Show data of experiment repeated three times.
Experiment 1

Boil	Hot	Cold
1	2:54	3:10
2	2:30	3:20
3	2:43	3:03

Experiment 2

Freeze	Hot	Cold
First		x
Second		x
Third		x

Experiment 3

Freeze	Salt Water	Tap Water
First		x
Second		x
Third	x

5. List your controlled variables for your experiment
        Water Tempurature
         Heat of stove
         Temperature of freezer
         Cups used to freeze the materials
         Amount of water used

6.My theory is that water freezes or boils fastest when it is closest to boiling or freezing point and salt slows this process down. The water molecules are moving fastest when they are boiling and slowest when frozen. A cup of hot water will have molecules that are moving faster than molecules in cold water which means the hot water will boil faster and the cold water will freeze faster.

7. Image of the atoms that make up water molecules. A water molecule is made up of two hydrogen atoms and one oxygen atom.

8. Video or animation that shows how water molecules are arranged in the three states of matter for water.

https://www.youtube.com/watch?v=v12xG80KcZw&noredirect=1

9.Describe the scientific method/process and how each step correlates to your own experiments.

The scientific method/process is how you go about an experiment or testing a theory.

First your must have something you have observed and are trying to see if there is a significance to this.
Then you must create a hypothesis. I first created a hypthosis by saying what would happen when I conducted the theory.
Nest you design an experiment. I did this by deciding how I would boil and freeze my water.
Now you see if your hypothesis matches the results and if not switch the hypothesis and continue to test it to prove this.
Once you have results that continue to match your hypothesis you may make a theory to explain this evidence.

10. Talk about the repeatability of experiement?  What is the average values?

The repeatability proved to stay true each time I tried them. I did each experiment three times. When I was boiling water the results were somewhat close but that could have been because of the pots I was using. I had the cold water in a small pot the first and third time I tried it. The smaller pot allows the water to heat up faster.

11. Write a three paragraph statement about your experiment and connections to a real-world application. First paragrah: Intro of the science concepts. Second paragraph describe your experiment, data and conclusions. Third paragraph:Apply your science concepts and knowledge to a real-world application. After reading these paragraphs, a person should realize why these science concepts are important while gaing knowledge realted to the topic.

To do this experiement I first created a hypothesis. A hypothesis is a testable explanation of observed data. My hypothesis was what I thought would happen for each of the questions. Then from there I created an experiment to see if I could back up my hypothesis. Once I decided I could back it up with evidence I created a theory. A theory is a set of hypothesis that have been tested. Molecules are a group of two or more atoms held together by a chemical bond. The molecules move faster when hot and slower when cold. 

My experiment was conducted to see how the state of the water would change given different temperatures. I set it up by putting two cups of water in two different pots. One pan had hot water and one had cold water. Each pot was then put on high heat and was timed until one started to boil. I then put one cup of water in four different cups. One cup had hot water and one had cold water. Another two cups had the same temperature but one had salt and one did not. I checked on them each ten minutes to see which one was freezing first. I recorded these and then repeated each experiment three times. I found that the hot water boiled first due to the molecules starting at a faster rate. The cold water froze first due to the molecules already moving very slow. Finally the salt water froze slower than the regular water. The salt makes the molecules work faster. 

I have two real world applications for the experiments I did. First when it comes to winter a lake or pond will not freeze immediately. It needs time to cool before it can freeze. if the temperatures have been cool for a while then when it goes below freezing a lake will freeze faster than it would if the temperatures had been warmer before. My other application is how we use salt to melt ice. This winter when it became very icy I put salt on my sidewalk to melt the ice so no one would slip. The salt speeds up the movement of the molecules which melts ice.