Mars is only about one-half the diameter of Earth, but both planets have roughly the same amount of dry land surface area.This is because over two-thirds of Earth’s surface is covered by oceans, whreas the present surface of Mars has no liquid water. Mars and Earth are very different planets when it comes to temperature, size, and atmosphere, but geologic processes on the two planets are surprisingly similar.
Exercises
1) Draw two diagrams (graphic bars) to illustrate the composition of the atmosphere of Mars and of Earth.
2) Identify and complete the next diagrams:
