8. Medical technicians often use lead shields to protect themselves. This is because they are being exposed to . a. Alpha radiation
b. Beta radiation
c. Gamma radiation
d. Solar radiation

c . it is because of Gamma radiation

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

lol idk man i guess u gotta ask bill nye the science guy