Activity #1

Here are three experimental questions to answer:

1. Does hot water or cold water freeze faster?

-Cold Water

2. Does hot water or cold water boil faster?

-Hot water

3. Does salt water freeze faster or slower than regular water?

-Slower

1. Pictures of your experimental materials and setup.

Warm and cold water in cups

Afterwards you can see that the cold water froze faster with the dime sitting on top of the ice of the Cold cup and laying at the bottom of the Warm cup.

2. Your hypothesis to the questions posed.

-My hypothesis is that the cold water will freeze faster then the hot water because it is alread cooled, and the hot water will boil faster because its temperature is already risen, and that salt water will freeze slower because salt water is harder to freeze.

 

3. Data in the form of a graph or table

	Freezing time	Boiling time
Hot water	1 hr. 25 min.	3 min. 23 sec.
Cold water	1 hr. 19 min.	4 min. 10 sec.
Salt water	1 hr. 54 min.	-

4. Show data of experiment repeated

	Freezing time	Boiling time
Hot water	1 hr. 23 min.	3 min. 40 sec.
Cold water	1 hr. 16 min.	4 min 39 sec.
Salt water	1 hr. 56 min.	-

 

5. List your controlled variables for your experiment

-freezer is at a consistent temperature

-Burners on stove at a consistant heat

-amount of water being used

-amount of salt uses for salt water

-temperature for cool/hot water

 

6. Formulate a theory that answers the questions posed.

-The hot water boiled faster because it was easier for it to reach the boiling point, Cold water froze faster because it is easier for it to reach freezing point vs hot water. I think hot water will cool faster due to the huge temperature change but i stand to my results that cold water will freze faster. Salt water froze slower because the salt decreases the freezing point of the water.

 

7. Image of the atoms that make up water molecules.

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

Matter: Solids, Liquids, and Gases

http://youtu.be/s5CFasuhHTQ

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

1. Conduct a Hypothesis

2. Plan out the experiment and materials needed

3. Gather materials needed

4. Perform the experiment and record data

5. Compare data

6. Based on your results compare whether your hypothesis was correct or not.