Hey there,
Your answer is:
4
The world deserts are divided into 4 categories.
- Ari -
Oil is non-renewable, the rest are renewable
Every 3 turns 1 molecule is made
Remember that a controlled variable is a variable that stays the same thoughout the experiment.
it wouldn't be a. because two different wires were used
the final length of the wax would be your dependent variable, so it wouldn't be c.
the thermal conductivity is the independent variable so it isn't d.
the original length of the wax was the same for both.
So B is your answer.
