Duration: 90 minutes
Notes / Activity
Using identical blocks to melt the ice, see which melts the ice faster
Demo Experiment activity or Group activity:
Using spoons of different materials to melt the butter
“What did you observe in the video?”
“Which materials gain heat slowly?”
Ans: Plastic, wood
“Which materials gain heat quickly?”
“Group A said that plastics gain heat slowly, is this correct?”
“Group B said that metal gains heat slowly, is this correct?”
“No. Metal gains heat quickly.”
E.g. You are challenged to design and build a container that prevents ice from melting the slowest.
Step 1: Line container 1 with table towel.
Step 2: Fill container 2 with styrofoam balls/cotton buds.
Step 3: Prepare another identical container with nothing in it (control setup).
Step 4: Fill container 4 with a combination of bubble wrap and styrofoam balls, or combination of bubble wrap and cotton buds.
Step 5: Prepare 2 ice cubes into each bowl.
Step 6: Sealed the containers.
Step 7: Record how long it takes for the ice cube to melt in each bowl.
Which container of ice took the longest time to melt? Why?
Which container of ice took the shortest time to melt? Why?
Which material is the best to prevent the ice from melting quickly?
Your refrigerator has just broken down! All the food and drinks in it are going to go bad if they are not kept at the optimal temperature. How can you design a cooler that can help you store all the items without letting them go bad?
Why is it important to keep perishable food and drink within a safe temperature range?
What worked well and what didn’t?
How would you change your cooler design for the future?