Problem 1
Discuss the formation and composition of Earth's earliest atmosphere.
Problem 2
How and when did Earth's secondary atmosphere form? Compare the composition of this atmosphere with that of the modern one.
Problem 4
What process first began producing oxygen about \(2.7\) billion years ago? Why did the oxygen concentration remain low for 300 million years?
Problem 5
Briefly describe the First Great Oxidation Event.
Problem 6
How did banded iron formations form? How did their formations affect the atmosphere?
Problem 8
List the two most abundant gases in the atmosphere. List three other, less abundant gases. List three nongaseous components of natural air.
Problem 10
What is a barometer and how does it work?
Problem 13
Briefly list the major sources of air pollution.
Problem 14
What air pollutants are generated when coal and gasoline burn?
Problem 15
What is acid rain, how does it form, and how does it affect people, crops, and materials?
