Give two examples of fossil fuels.

Which process is used to harness nuclear energy these days? Explain it briefly.

Electricity generated with a windmill is another form of solar energy. Explain.

Make a list of conventional and non-conventional sources of energy. Give a brief description of harnessing one non-conventional source of energy.

Ranvir lives in a village and uses wood as a fuel. He studied in his school that charcoal is a better fuel than wood. He decided to use charcoal instead of wood.
$(a)$ How can Ranvir obtain charcoal from wood?
$(b)$ Why is charcoal considered a better fuel than wood? (Give two reasons)

State any two activities from our daily life in which solar energy is utilized.