Dry Ice Labs and Test
Lab #1
Video 1: What happens to dry ice when it is placed on a paper towel and then placed on a counter top?
Before watching this video make sure you write down your hypothesis for how the dry ice will behave on the paper towel and on the counter top.
Before watching this video make sure you write down your hypothesis for how the dry ice will behave on the paper towel and on the counter top.
Lab #2
Video #2: What happens to the mass of dry ice when it is exposed to the air?
This video shows the set up of the lab and the starting mass of the dry ice on the scale.
Video #3 - Showing mass of dry ice after 1 min on the scale.
Video 4: Showing mass after 2 min
Video 5: Showing mass after 3 min
Video 6: Use this video to get qualitative data of the dry ice on the scale.
Video 7: Showing mass after 4 min.
Video 8: Showing mass after 5 min.
Lab #3
Video 9: What happens to dry ice when it is placed in a beaker of hot water and a beaker of cold water?
Video 10: Showing 5 min after the dry ice has been in the water.
Lab # 4 - Your Test
After performing the 3 labs in class and practicing the write up, its your job to create, design and perform a lab using dry ice.
Step 1: Problem Statement (ask a question you would like to answer about dry ice)
Example: What would happen if........... (I put food coloring in water with dry ice).
Step 2: Background Information (tell me what you know about the materials you will be using)
Example: I know that dry ice is really cold, -78.5 degree C. I know that it will sublimate and this looks like bubbles when dry ice is under water. I also know that food coloring in water will make the water the color of the food coloring.
Step 3: Hypothesis (what do you think will happen)
Example: If I put red food coloring into water and then place dry ice into the water and compare it to dry ice in regular, clear water, then the water with food coloring will make the bubbles of the dry ice red too, because food coloring changes color of things.
Independent Variable: (what is the ONE thing you are changing in this lab) Example: food coloring of water
Dependent Variable : (what the independent variable will cause the change to) Example: bubbles of dry ice
Controls: (things that are kept the same in the lab) Example: amount of water, same size of dry ice, sizes of beakers,
time in the water.
Step 4: Procedures (write instructions for performing the lab and draw a picture of the set up too)
Example: 1- Set up according to diagram. 2- Place equal amounts of dry ice the clear water and in the red food colored water. 3- Observe and record the color of bubbles coming off each of the two beakers. 4- After 3 minutes, empty beakers into sink and clean up.
Step 5: Display your data collected in a data table /chart and graph if (if applicable).
Step 6: Answer the 6 conclusion questions.
After performing the 3 labs in class and practicing the write up, its your job to create, design and perform a lab using dry ice.
Step 1: Problem Statement (ask a question you would like to answer about dry ice)
Example: What would happen if........... (I put food coloring in water with dry ice).
Step 2: Background Information (tell me what you know about the materials you will be using)
Example: I know that dry ice is really cold, -78.5 degree C. I know that it will sublimate and this looks like bubbles when dry ice is under water. I also know that food coloring in water will make the water the color of the food coloring.
Step 3: Hypothesis (what do you think will happen)
Example: If I put red food coloring into water and then place dry ice into the water and compare it to dry ice in regular, clear water, then the water with food coloring will make the bubbles of the dry ice red too, because food coloring changes color of things.
Independent Variable: (what is the ONE thing you are changing in this lab) Example: food coloring of water
Dependent Variable : (what the independent variable will cause the change to) Example: bubbles of dry ice
Controls: (things that are kept the same in the lab) Example: amount of water, same size of dry ice, sizes of beakers,
time in the water.
Step 4: Procedures (write instructions for performing the lab and draw a picture of the set up too)
Example: 1- Set up according to diagram. 2- Place equal amounts of dry ice the clear water and in the red food colored water. 3- Observe and record the color of bubbles coming off each of the two beakers. 4- After 3 minutes, empty beakers into sink and clean up.
Step 5: Display your data collected in a data table /chart and graph if (if applicable).
Step 6: Answer the 6 conclusion questions.