Chapter 12, Problem 2VSC

Use the following questions to check your understanding of some of the many types of visual information used in astronomy. Rir additional practice, try the Chapter 12 Visual Quiz at MastetingAstninomy*1 2 3.

The graph above I Figure 12.30) shows how often impacts occur for objects of different sizes. The photo above shows Comet Tempel 1 moments before the Deep Impact spacecraft crashed into it.

1. Meteor Crater m Arizona is about 1.2 kilometers across. According to the graph, about how big was the object that made this crater? (Note: Be sure to read tine axis labels carefully.)
1. I meter
2. 10 meters
3. 100 meters
4. 1 kilometer
2. How often do objects big enough Io create craters like Meteor Crater impact Earth?
1. once in Earth's history
2. about once every ten thousand years
3. about once every few million years
4. about once every day, but most burn up in the atmosphere or land in the ocean