Topics 3,4,5 - Acids, Metals & Fuels: Biofuels

Question 1

Give some advantages of replacing fossil fuels with biofuels.

Answer 1

E.g. biofuels are renewable, unlike fossil fuels. The crops used to make biofuels absorb carbon dioxide while they’re growing. This balances the carbon dioxide released when they’re burnt.

Question 2

Give an example of a biofuel and say how it is made.

Answer 2

E.g. ethanol. It’s made by fermenting sugars from crops such as sugar cane or sugar beet.

Question 3

Give a disadvantage of replacing fossil fuels with biofuels.

Answer 3

E.g. a large amount of land is needed to grow the crops used to produce the biofuels. This reduces the land available to grow crops for food.