Chemical Changes

4. An acid will react with an alkali to form a salt and water. This reaction is called ____.
5. A change in which no new substances are formed is called a _____.
6. ___ is a chemical reaction that makes use of an electric current to coat object with different metals.
7. Substances that react with each other and start the chemical change are known as _____.
8. This gas will extinguish a lighted splint with a 'pop' sound.
11. A chemical reaction in which a substance is heated in presence of oxygen to form one or more new substances is known as _____.
12. This substance has a sour taste and can be corrosive.
13. Rusting and respiration are example of the chemical change called ______, when a substance gains oxygen.
15. When large amounts of air pollutants and carbon dioxide is released into the air, these gases can dissolve in sea water and cause _____ acidification.

1. Substances that are formed at the end of the chemical change are known as _____.
2. Water is neither acidic or alkaline. Water is a ____ substance.
3. To test for carbon dioxide gas produced, we can use _____.
5. ____ is a chemical reaction that occurs in green plants.
9. thermal Calcium carbonate can undergo thermal _____ to form calcium oxide and carbon dioxide.
10. Sulfur dioxide, an air pollutant is produced during ____ eruptions.
14. This substance turns red litmus paper blue.