What is an example ecosystem of snails?

Imagine a rocket launching from earth and travelling to the moon. in which order would the rocket pass through the layers of the atmosphere? thermosphere, mesosphere, stratosphere, troposphere troposphere, mesosphere, stratosphere, troposphere thermosphere, stratosphere, mesosphere, troposphere troposphere, stratosphere, mesosphere, thermosphere

Compare the composition of the moon's surface with the composition of the earth's surface.

Which would be the most useful source of evidence to support mcneill's contention?