Here is a Cultural Literacy worksheet on the Alvarez Hypothesis. This is a half-page worksheet with a three sentence reading and three comprehension questions. For more on Luis Walter Alvarez and his son, Walter Alvarez, see the post immediately above this one.
If you find typos in this document, I would appreciate a notification. And, as always, if you find this material useful in your practice, I would be grateful to hear what you think of it. I seek your peer review.