How is crude oil separated by fractional distillation?

What are the different fractions from crude oil?

Why are fossil fuels non-renewable?

Why does fractional distillation work?

Why are fossil fuels finite resources?

How is crude oil made?

Why can crude oil be separated by fractional distillation?

What are intermolecular forces are what happens to them during boiling?

Why does bitumen and heavy oils have high boiling points?

What are the problems caused my drilling oil?

What are the conditions needed for 'cracking'?

What happens during cracking?

What are the main characteristics that are looked at when choosing a fuel?

What is the word equation for a fuel burning in the air?

What are word equations for incomplete combustion?

Katherine's heater is over 50 years old. She has never had it checked. Explain why this is dangerous.
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What are the advantages of complete combustion over incomplete combustion?

What are the environmental problems caused by burning coal?