11. It is a form of radiation burn that affects living tissue, such a skin, that results from an overexposure to ultraviolet (UV) radiation, commonly from the sun.
a. corns
b. sunburn
c. blisters
12. A growing callus often on the foot.
a. corns
b. sunburn
c. blisters
13. ______ are damage to the structure of a tooth.
a. gingivitis
b. cavities
c. periodontitis
14. It is an "inflammation of the gum tissue"; is a non-destructive disease that occurs around the teeth.
a. gingivitis
b. cavities
c. periodontitis
15. It is also known as a bad breath, a symptom in which a noticeably unpleasant odor is present on the breath.
a. gingivitis
b. halitosis
c. periodontitis


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