A beaker with fine ice is taken from a freezer and left on a laboratory table to melt. The temperature is measured every 5 minutes for one hour. The temperature in the
laboratory is 20°C. The results are tabled below.
10
Time(min) 10
Temp(ºC) 1-10
5
-5
15
0
20
0
25
0
30
2
35
9
40
14
45
18
50
19
55
20
1.1 Use the information in the table and draw a line graph on the graph paper
provided.
(6)
1.2 What was the temperature in the freezer?
(2)
1.3 What happens to the ice between 15 and 20 minutes after it has been taken from
the freezer?
1.4 Why was the temperature in this time not changed?
(2)
1.5 Which property of ice causes it to float in water?
(1)
1.6 What, in the structure of water, makes the property in 1.5 possible?
1.7 In this property of ice (named in 1.5) did not exist, how would the marine life in
the cold arctic regions be influenced by it?
(2)​