Science students are studying specific heat capacity and trying to make decisions about what materials would be good insulators and conductors. Student groups set up this experiment.

Materials/group:
~thermometer
~Stopwatch
~4 empty soda cans to be filled:
One can filled 1/2 way with water
One can filled 1/2 way with sand
One can filled 1/2 way with iron filings
One empty can

~Tub of ice water
Procedures:
1. Record the initial temperatures inside each can.
2. Place the four cans into the ice water bath, leaving them for 5 minutes.
3. Remove the cans and record the final temperatures of each can.
Specific Heat Capacity
Material Specific heat capacity J/goC at 25C
Copper 0.385
Iron 0.450
Sand 0.830
Aluminum 0.897
Air 1.012
Cork 2.000
Water 4.181
1)
Consider the data table as well as the experimental design. Which of the four cans should have the greatest change in temperature after five minutes?
A) air
B) sand
C) water
D) iron filings
2)
Once the activity had been completed, the instructor asked the students to design an insulated container they could use to keep 100mL of water hot. The only stipulation was that the insulator had to be a solid. The team that kept the water hot, at least 85C, for the longest amount of time, would win a prize. If you were participating, what would you use as your insulator?
A) aluminum
B) cork
C) sand
D) water