Write a selection of answers on the board – students then think of questions which lead to those answers. There can be many different questions that lead to each answer.
1. Fossil Fuel
2. The Sun
1. What kind of fuel is crude oil? What name is given to a fuel that takes a long time to form?
2. Where does the energy in coal ultimately come from?
3. Name a fossil fuel. Which fossil fuel is made from dead trees?
I usually get students to write their questions down in their books, then I pick a few of them randomly to share their questions with the class.