Everyday Reactions

4. A type of reaction where heat is give out.
5. These are found in the periodic table.
6. The name of the element Mg.
7. The most important element in air is __________.
9. A type of reaction in the body that changes food (fuel) into energy, water and carbon dioxide.
15. The name of the element Fe.
17. All metals react with oxygen, and this is called _________.
19. A type of reaction where heat is absorbed.
20. Oxygen and water are required for this reaction and salt speeds it up.
21. Burning paper is a ___________ reaction.
22. The chemical formula for carbon dioxide.

1. A piece of equipment used to heat a substance.
2. Hydrogen and carbon dioxide are both ________.
3. A type of reduction reaction using heat.
7. The addition of oxygen to a compound is called an ___________ reaction.
8. A compound that contains hydrogen and oxygen.
10. The way in which iron is extracted from iron ore.
11. Oxygen, heat source and fuel are required for this reaction.
12. When everything in a reaction has reacted, you are left with the ____________.
13. In a chemical reaction the substances you start with are called ____________.
14. The chemical formula for water
16. Ice melting is a ____________ reaction.
18. The removal of oxygen from a compound is called a __________ reaction.