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Investigate Combustion

In this worksheet, students will investigate the chemical reaction of combustion.

'Investigate Combustion' worksheet

Key stage:  KS 3

Year:  Year 8 Science worksheets

Curriculum topic:   Chemistry: Chemical Reactions

Curriculum subtopic:   Types of Chemical Reactions

Difficulty level:  

Worksheet Overview

Have you ever seen something on fire? Well that's a chemical reaction happening right there in front of you. There's a special name for the type of reaction it is - combustion.




Combustion means burning. There are three things needed for a combustion reaction (for something to catch fire and remain burning).....


the fire triangle


An example of a fuel is wood, coal, petrol or natural gas. A heat source could be a lit match or a spark. And oxygen often is supplied from the air around us.


If you haven't got one of the three in the fire triangle - fuel, heat or oxygen - the fire will go out or not even start at all. This is a good thing for fire fighters as they can use this fact to put out a fire. Water is used by fire fighters to quickly remove heat from a fire - if you remove the heat, it will go out. Powder and carbon dioxide fire extinguishers are used to remove the oxygen from a fire - again if you remove the oxygen, the fire will go out. Foam extinguishers can remove both the heat and the oxygen. 


There's a word equation to show what happens during a combustion reaction:


Fuel + Oxygen → Carbon dioxide + water + energy


Happy to try some questions on combustion now?

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