TYPES OF CHEMICAL REACTIONS

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COMBUSTION

Combustion is a chemical reaction that produces heat and light. The most common form of combustion is fire. Most forms of combustion happen when the gas oxygen joins with another substance. For example, when wood burns, oxygen in the air joins with carbon in wood.

Some problems that combustion can cause are: global warming, respiratory illnesses and acid rain.
Visit this website to see the air pollution in different cities in the world.



OXIDATION 

Oxidation is a chemical reaction in which an atom loses one or more electrons to oxygen atoms. Oxidation causes changes to the properties and appearance of substances. There are two types of oxidation: 
  • Rusting: click here to watch the sad story of a robot.
  • Oxidation in fruit: click here to watch a video about oxidation in apples.

FERMENTATION
In this video, it is explained how yoghurts are made.

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