Chapter Questions
List and briefly describe each of Earth's four spheres.
List the three major layers of Earth. Which is/are composed of rock, which is/are metallic? Which is the largest; which is the thinnest?
List six types of reservoirs that collectively contain most of Earth's water.
What is groundwater? Where in the hydrosphere is it located?
What two gases compose most of Earth's atmosphere?
How thick is Earth's atmosphere?
Briefly discuss the size and extent of the biosphere.
Define a system and explain why a systems approach is useful in Earth Science.
Briefly explain the statement: "Matter can be recycled, but energy cannot."
How old is Earth? When did life first evolve? How long have humans and their direct ancestors been on this planet?
Compare and contrast gradualism and catastrophism. Give an example of each type of geologicchange.
Briefly explain threshold and feedback effects.
Briefly outline the magnitude of human impact on the planet.