The is the difference between the highest and lowest points of a mapped area. contour interval
contour line
relief
mean sea level

What's erosion? a. the breakdown of rock into smaller pieces b. the removal of weathered products from rock c. a change in rock resulting from exposure to water d. a chemical change in rock that weakens it

What was apartheid and how did it restrict the rights of non-whites?

The oldest seafloor in the atlantic ocean is located closest to the edge of the continents. explain how this age can be used to figure out when north america first began to separate from europe