Activity 1

Here are three experimental questions to answer:
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?

Questions/Items to then include in you blog posting for this activity:
1. Pictures of your experimental materials and setup.

I will create three experiments. The first experiment I will put two tablespoons hot water in one cup and two tablespoons cold water in the second cup. I will then place both of these in the freezer and time how long it takes for them each to freeze. I will check the freezer every 5 minutes. I will record the time it took for each cup to freeze. This will be repeated three times.

In experiment two, question 2, I will put two cups hot water into one pot and two cups cold water into the other pot. The two pots will be placed on the stove on high. I will record the times it takes for both of the pots to boil. I will do this experiment three times to avoid any error. Each time I do the experiment I will replace both pots with new water. Once again, One being cold water and the other being hot water.

In experiment three, question three, I will fill one cup with with two tablespoons of water and one tablespoon of salt. The other cup I will fill with two tablespoons of regular water. These will be placed in the freezer and I will check the cups every 5 minutes. I will record the time it took for each to freeze. This will be repeated three times.

Supplies needed: 2 pots, cups, salt, a freezer, stove, measuring cups.

 

2. Your hypothesis to the questions posed.

Question 1: I believe the cold water will freeze faster than hot water because it is closer to reaching its freezing point.

Question 2: I believe that hot water will boil faster than cold water because it is closer in reaching a boiling point.

Question 3: I believe that regular water will freeze faster than the salt water because salt melts ice.


3. Data in the form of a graph or table

4. Show data of experiment repeated three times.

Experiment 1: Does hot water or cold water freeze faster?

	2 tbsp hot water @ 63°C: Freeze Time	2 tbsp cold water @ 5.3°C : Freeze Time
Test 1:	10 minutes 12 seconds	8 minutes 55 seconds
Test 2:	11 minutes 4 seconds	9 minutes 10 seconds
Test 3:	10 mintues 20 seconds	8 minutes 30 seconds
Average:	10 minutes 12 seconds	8 minutes 32 seconds

Experiment 2: Does hot or cold water boil faster?

	2 cups hot water @ 63°C: Boil Time	2 cups cold water @ 5.3°C: Boil Time
Test 1:	1 minutes 2 seconds	2 minutes 30 seconds
Test 2:	45 seconds	2 minutes 16 seconds
Test 3:	58 seconds	2 minutes
Average:	1 minute 35 seconds	2 minutes 23 seconds

Exeriment 3: Does salt water freeze faster or slower than regular water?

	2 tbsp water with 1 tbsp salt at room temperature	2 tbsp regular water at room temperature
Test 1:	35 minutes	9 minutes 55 seconds
Test 2:	43 minutes 10 seconds	10 minutes 58 seconds
Test 3:	42 minutes 17 seconds	10 mintues 55 seconds
Average:	40 minutes 14 seconds	10 minutes 56 seconds

5. List your controlled variables for your experiment
Controlled variables would be:
Amount of water poured into cups
Amount of salt poured into cup
How high the stove was (high)
The temperature of the freezer(3/4 to coldest temperature allowed)

6. Formulate a theory that answers the questions posed.

For the first experiment: The cold water froze faster than the hot water. After doing some research, this is because the molecules in cold water are moving slower than the hot water molecules. Also, ice water is zero degrees C. The cold water is closer to a freezing temperature.

For the second experiment: The hot water boiled faster than the cold water. The temperature for boiling water is 100 C. The hot water is closer in temperature to boiling than the cold water is.

For the third experiment: The salt water took longer to freeze than the regular water. This is because salt, which is a solute, causes the freezing point of water, which is a solvent, to be lowered.

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.

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

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

Step 1: Observation
The observation was the three questions that were asked. I had to observe all three experiments three times.

Step 2: Hypothesis
I formed a hypothesis for each of the questions. This helped me have a sense of direction with my experiments.

Step 3: Experiment/Testing
This is the actual experiments performed. I used the three questions to help me preform my experiments. I also used description of each question stating what I will be doing along with pictures.

Step 4: Analysis
I used three charts to show my data. Each chart consisted of accurate information, labels, and an average total. I tested each experiment three separate times.

Step 5: Conclusion
The conclusion matched my hypothesis. I figured out the conclusion with the end results, experiments, and numbers in my charts.

10. Talk about the repeatability of experiemnet? What is the average values?
The repeatability of an experiment shows accuracy and reliability. It is doing an experiment several times in case something went wrong in the first trial. By doing it three times is shows consistency and a better end result. I had an average value for each of the questions:

Does hot or cold water freeze faster?

Hot Water Cold Water

Average:

10 minutes 12seconds

8 minutes 32 seconds

Does hot or cold water boil faster?
Hot Water Cold Water

Average:

1 minute 35 seconds

2 minutes 23 seconds

Does salt water freeze faster or slower than regular water?
Salt Water Regular Water

Average:

40 minutes 14 seconds

10 minutes 56 seconds

11. Write a three paragraph statement about your experiment and connections to a real-world application. First paragraph: 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 gaining knowledge related to the topic.

This experiment introduced several scientific concepts. One we used was the scientific hypotheses. We had to have three different hypotheses to set a testable explanation and set a base of our experiment. We had to see if we were accurate through the steps of the scientific method which are: observation, hypothesis, experiment, analysis, and conclusion. We also developed an experiment that involves three states of matter: liquid, solid, and gas.
I learned a lot preforming these experiments. The scientific method helped me realize that the more detail and specific facts that are presented in an experiment provide accuracy. I preformed all three experiments that matched my hypothesis and in the end were my conclusion results. The cold water froze faster than hot water, the hot water boiled faster than the cold water, and that regular water froze faster than salt water.
These experiments showed me some helpful daily life tips. For example, when it is icy outside or in front of my door, I can apply salt to prevent more ice from forming. I also found out that hot water boils faster than cold water which can help when it comes to cooking. If ice is needed for a gathering and I am running out of time, I will now know that cold water will freeze faster. These three experiments provided me with more reasons and facts for my conclusion.