What do mapmakers use as a key to explain all the symbols used on a map?
a. compass rose
b. projection
c. legend
d. scale

Ships can transit between the atlantic and pacific oceans using the canal.

Which evidence is most likely used to indicate the beginning of solar system formation? a. materials combined to form a mass. b. materials were pulled together by gravity. c. water condensed and collected to form oceans. d. different species of microorganisms lived on earth.

Adesert is an example of a(n) and the gobi desert is an example of a(n) a. ecosystem biome b. biome ecosystem c. ecosystem climate d. climate biome