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What are the three things needed for combustion?
Oxygen, fuel and heat
What speeds up oxidation?
Salt
What do microorganisms do in fermantation?
transform sugar into organic substances
What does baterial produce?
Latic acid carbon dioxide
Fermentation involves _______
Microorganisms
Fermentation occurs when there is no _____
Oxygen
Name two different foods that oxidise
When some metals react with oxygen they turn reddish brown. This is called ____
Rust
Oxidation is a chemical reaction that occurs when a substance reacts with _____
oxygen
What energy is produced from combustion?
Heat and light energy
What are the new substances that are made from combustion?
Smoke and ash
Thermal energy, oxygen and ______ can cause a chemical reaction to take place.
Microorganisms
What is an example of combustion?
fire
Why can´t we use a chemical reaction to seperate a new product?
Because the atoms are chemically linked
What are the orginal substances called in a reaction?
reactants


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