Required Practical 2

Question 1

Why does the student stir the water before taking each measurement?

Answer 1

To improve the accuracy of the data

Question 2

Explain one way the student could improve the set-up of the experiment

Answer 2

• Cut a hole in the lid so that the thermometer can remain in the water
• So energy is not lost to the surroundings whenever the lid is removed

Question 3

What is the independent variable in this experiment?

Answer 3

The number of layers of tin foil

Question 4

Suggest two things the student should do to ensure the experiment is a fair test

Answer 4

• Start water at the same temperature
• Use the same type of foil