1. Why does Earth's moon have no atmosphere
- the average temp is too high
-there are no plants to release oxygen
-the moon is too far from Earth
-the moon's gravity is too weak to hold onto gas molecules
2. On the moon , maria are
-meteoroid craters
-low flat plains
-rough mountains
-lunar seas filled with water
1. Earth's moon has no atmosphere because the moon's gravity is too weak to hold onto gas molecules. 2. On the moon, maria are low flat plains. The word maria comes from the Latin word mare, which means sea.