| A | B |
|---|
| techniques essential for removing plaque from teeth | brushing and flossing |
| how a small pocket around a tooth affect periodontal disease | bacteria and food particles become trapped in the pockets and become infected |
| how eating sweet, sticky foods lead to dental problems | they form acids and attack the enamel of your teeth |
| how sound vibrations affect the small bones in the middle ear | they stimulate the auditory nerve and the nerve sends impulses to the brain which interprets the impulses as sounds |
| how can loud sounds affect the cochlea | they destroy the cells of this organ |
| what has to enter the eye for vision to occur | light |
| keeping skin clean can prevent these problems | perspiration odor, acne, and dandruff |
| glands that help cool the body and remove some body wastes | sweat glands |
| the part of life when the sebaceous glands produce extra sebum | puberty |
| what happens to skin when bacteria infect blocked pores | pimples |
| how can oily facial creams harm a teenager's skin | they can block the pores |
| what you use to protect your skin at the beach | sunscreens |
| indicates that a person's skin will take eight times longer to burn than unprotected skin | SPF 8 |
| what happens to the body when you sleep | 1) your body rests, 2) heart rate and breathing slow down, 3) your body temperature and blood pressure drop, 4) your muscles relax |
| most teenagers need this many hours of sleep each night | 9-10 hours |
