description Does any element with Z <= 92mal the description ? If you checked yes, give the symbol of an element with z <= 92 that matches. An element in Period 2 and Group 4A. Yes A nonmetal in Group 7A. Yes An alkali metal with a lower atomic number than radon. Yes No A transition element in Period 4.Yes

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:

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.