1. What information is obtained from studies of oxygen-isotopic compositions in meteorites? (There is more than one thing.) HINT: Look at the figures, figure captions, and tables. Also look at the Achondrites section starting on p. 138, and the Iron meteorites section starting on p. 141.
2. In many of the figures, there are two lines marked "TF" and "CAI". What do these two lines represent and what is significant about their two different slopes?