1. Which layer of the atmosphere has: a. the most water vapor?
b. the lowest pressure?

2. What remains the same in different layers of the atmosphere?

3. Scientists have divided the earth's atmosphere into different layers. What property of the atmosphere do you think these divisions are based on?

4. You collected data on four layers of the atmosphere. The atmos- phere merges into outer space in an extremely thin upper layer known as the exosphere. Which of the five layers of the atmos- phere do people live in?​