Question 45
Complete these sentences. Choose words from the box.
source; heat; nitrogen; oxygen; unreactive; greenhouse; neutralisation; fuel; exothermic; endothermic; combustion
Methane is a ______ gas produced in biogas digesters. It can be used as a ______ for cooking and heating. When methane burns, it reacts with ______ in the air to produce carbon dioxide, water vapour and ______. This process is called ______ and is an ______ reaction.
source; heat; nitrogen; oxygen; unreactive; greenhouse; neutralisation; fuel; exothermic; endothermic; combustion
Methane is a ______ gas produced in biogas digesters. It can be used as a ______ for cooking and heating. When methane burns, it reacts with ______ in the air to produce carbon dioxide, water vapour and ______. This process is called ______ and is an ______ reaction.
