Question 28
Work in groups. Plan an investigation to check whether water, oxygen or both need to be present in order for iron to rust.
Identify the variables to change, to observe and to keep the same in order to ensure a fair test. To find out whether oxygen, water or both are needed, you will need to test each on its own and both together. You will also need to check whether iron will rust if neither is present.
Identify the variables to change, to observe and to keep the same in order to ensure a fair test. To find out whether oxygen, water or both are needed, you will need to test each on its own and both together. You will also need to check whether iron will rust if neither is present.
