On a topographic map, what is used to show elevation? a. relief c. blue lines b. contour lines d. an open circle

Contour lines is the answer

b. contour lines

Hope this helps :)

The earth spins around. one side faces the sun, one side faces space. the side facing the sun, we call daytime. side facing away is cooler and is nighttime. a day on earth is 24 hours, that’s how long it takes the earth to fully rotate one time. hope this !

The fact that the earth goes through natural cycles for example the ice age some scientists belive that it is just another cycle