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Mariam Al Thani 7A. The pH scale measures if something is an acid or a base on a scale of 1 to 14. The pH scale measures if something is an acid or a.

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Presentation on theme: "Mariam Al Thani 7A. The pH scale measures if something is an acid or a base on a scale of 1 to 14. The pH scale measures if something is an acid or a."— Presentation transcript:

1 Mariam Al Thani 7A

2 The pH scale measures if something is an acid or a base on a scale of 1 to 14. The pH scale measures if something is an acid or a base on a scale of 1 to 14. Acids have a pH less than 7 Acids have a pH less than 7 Bases have a pH greater than 7 Bases have a pH greater than 7 A pH of 7 is neutral A pH of 7 is neutral

3 pH of saliva is between 6 and 7 pH of saliva is between 6 and 7 If the pH is 6, then it is 10 times more acidic than a pH of 7 If the pH is 6, then it is 10 times more acidic than a pH of 7 pH can be tested with universal indicator pH can be tested with universal indicator Color change with pH change Color change with pH change

4 Acids taste sour Acids taste sour Bases taste bitter Bases taste bitter Bases feel slimy Bases feel slimy Acids and bases react with each other Acids and bases react with each other

5 Cavities are formed when bacteria in plaque produce acids Cavities are formed when bacteria in plaque produce acids The bacteria that causes tooth decay feed on sugars The bacteria that causes tooth decay feed on sugars It is important to brush your teeth after eating It is important to brush your teeth after eating

6 Fluoride in toothpaste and water helps to prevent tooth decay Fluoride in toothpaste and water helps to prevent tooth decay Fluoride attaches to teeth and makes teeth reform calcium lost to acids from bacteria Fluoride attaches to teeth and makes teeth reform calcium lost to acids from bacteria


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