Vita Answer

3a) Milk bottle X
3b) Water is a better conductor of heat than air.

4a) Point A
4b) 20min - 5min = 15 min
4c) A passenger/ Jane had just sat on the seat (0.5m), heat is gained by the seat from his/her body (0.5m) causing the seat to gain more heat and the temperature rises at point C. (1m)

5a) Possible ans: A and D/ A and C/ B and D/ C and D
5b) D , B

6a) (The question is about Carly so the answer should be specific to Carly) 
      Carly was losing heat quickly to the environment.
6b) The air in the room gained more heat (1m) as heat from more heat was loss by the increased number of people in the room.

7a) Styrofoam
7b) Styrofoam is a poor conductor of heat (1m) so the heat loss from the noodles to the surrounding air was reduced. (1m)
7c) There is an increased exposed surface area (0.5m) to allow more heat loss (0.5m) from the noodles to the surrounding air. 
7d) Noodles: heat loss; Chopsticks: heat gain 

Hope this help :)
Mrs R