Problem Set1 Key - Name Discussion Section 100 points...

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Name: ___ / 100 points Discussion Section: Problem Set 1 ESPM 15: Introduction to Environmental Science Due in hardcopy at the beginning of lecture (9:10 am) on Friday, February 5, 2016 1) What was the source of water vapor (H 2 O) in earth’s early atmosphere? Explain what eventually happened to most of that water in the atmosphere. Which major gas in the earth’s current atmosphere was not present in the earth’s early atmosphere? ___ / 10 points - The source of water in the earth’s early atmosphere was degassing through volcanic eruptions. (3 pts) - When the earth’s early atmosphere cooled enough below water’s boiling point, most of the water vapor condensed/formed clouds and then precipitated as rain into the low lying regions of the earth and formed the oceans. (4 pts) - Oxygen (O2) was missing from earth’s early atmosphere (3 pts) 2) On the diagram below temperature is plotted against altitude. Label the: stratosphere, troposphere, and tropopause (be precise). In the troposphere, does temperature increase or decrease with gain in altitude? What is the source of heat in the troposphere? How about the stratosphere? ___ / 20 points -8 pts total for marking troposphere (3), stratosphere (3) and tropopause (2) -2 pts for identifying that temperature decreases with altitude in the troposphere
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