ASTR220 Fall 2003 QUIZ 1 (marked out of 10) Name: This quiz consists of 3 short-answer questions (plus 1 bonus question). Point values are indicated. You will have 15 minutes. Please do not use notes or calculators. 1. [6 points] From your reading, describe 3 lines of evidence that support the idea that a 10 km meteorite impacted the Earth 65 million years ago. (over, please) 2. [2 points] Why did Luis and Walter Alvarez have so much trouble convincing many geologists and paleontologists of their theory? 3. [2 points] Why are Earth craters typically younger and larger than most other craters in the solar system? BONUS: [1 point] Before the Chicxulub crater was discovered, how was the size of the K-T impactor estimated?