Teeth and microbes
A. Which one is correct ? 1. Yellow substance on teeth is called- a. dentine b. tar tar c. plaque Ans: b 2. We must floss your teeth a. every month b. everyday c. every week Ans: b 3. Sweets and chocolates ____ our teeth . a. spoil b. perfect c. clean Ans: a 4. Tooth decay causes a. toothache b. holes in teeth c. both Ans: c 5. Molars are also called a. tearing teeth b. cutting teeth c. grinding teeth Ans: c 6. The centre of each tooth is called a. dentine b. pulp c. crown Ans: b B. Fill in the blanks : 1. We must brush your teeth at least twice a day . 2. Milk has calcium that makes our teeth strong. 3. We must wash or floss your teeth everyday. 4. Microbes are very small living things. 5. Microbes that cause diseases are called germs . C. Write T' for true or 'F' for false statements : 1. We all are born without teeth. True 2. Every adult has a set of 36 teeth. False 3. There are three kinds of permanent teeth. False 4. We should avoid too many sweets and