Hot coffee anyone?

This task is about interpreting data.

Sua wanted to find out if coffee stayed warmest for longer in a polystyrene cup, a paper cup, or a pottery mug.

She found three cups the same size and shape and put 150 mL coffee at 70°C into each. She left them side by side on a table, and recorded the temperature of each cup every two minutes. Here are her results: 

  Temperature of coffee (°C)
Time
(minutes)		 Polystyrene
cup		 Paper
cup		 Pottery
mug
0
2
4
6
8
10
12
14
16
18		 70
58
48
40
32
26
20
20
20
20		 70
54
42
30
20
20
20
20
20
20		 70
60
52
45
40
36
31
27
24
20

Question 2Change answer

a)  Which container had the hottest coffee after six minutes? polystyrene cuppaper cuppottery mug

Question 2Change answer

b)  What was the temperature in the polystyrene cup after eight minutes?   º C

Question 2Change answer

c)  Which container of coffee cooled the quickest? polystyrene cuppaper cuppottery mug

Question 2Change answer

d)  How long did it take for the coffee in the polystyrene cup to cool to room temperature?   minutes

Question Change answer

 e)  Sort the materials: polystyrene, paper, and pottery, from best insulator to worst insulator.
  • polystyrene
  • paper
  • pottery