Everyday Reactions

4. These are found in the periodic table.
8. The most important element in air is __________.
11. The chemical formula for water
12. In a chemical reaction the substances you start with are called ____________.
13. A type of reduction reaction using heat.
18. The way in which iron is extracted from iron ore.
19. Burning paper is a ___________ reaction.
20. The removal of oxygen from a compound is called a __________ reaction.
21. Ice melting is a ____________ reaction.
22. The name of the element Mg.
23. The chemical formula for carbon dioxide.

1. A piece of equipment used to heat a substance.
2. The name of the element Fe.
3. When everything in a reaction has reacted, you are left with the ____________.
5. A type of reaction where heat is give out.
6. All metals react with oxygen, and this is called _________.
7. Oxygen and water are required for this reaction and salt speeds it up.
9. Hydrogen and carbon dioxide are both ________.
10. Oxygen, heat source and fuel are required for this reaction.
14. A type of reaction where heat is absorbed.
15. A type of reaction in the body that changes food (fuel) into energy, water and carbon dioxide.
16. The addition of oxygen to a compound is called an ___________ reaction.
17. A compound that contains hydrogen and oxygen.