Climate Change: Winners and LosersLesson 2: Earth's Climate HistoryPage 1 Page 2 Page 3 ReviewAnswer Sheets: MS Word Lesson Review Lesson Review, PDF Version
1) From 1,000 A.D. until around 1900 A.D. average global temperatures were ____________________ slightly. (page 1) 2) After 1900 A.D., average global temperatures started _______________________ rapidly. (page 1) 3) Some of the evidence that scientists use to infer temperature changes in the past include _______________________, chemical changes in _______________________ and ______________________________________________ and fossils. (page 2) 4) Over the past 800,000 years, there have been times when temperatures cooled and glaciers covered much of North America. We call this an _______________________ when this happens. (page 2) 5) The last _______________________ ended around 20,000 years ago. (page 2) 6) Warm periods between ice ages are called _______________________ phases (page 2) 7) Over the past 1 billion years, Earth's climate has switched back and forth between extended warm periods and cool periods. The long, cool periods are often called _______________________ . (page 3) 8) The long, warm periods are often called _______________________. (page 3) 9) Some scientists think that at times Earth was so cold that most of the surfaces of the oceans froze over and the planet was covered with ice. This is known as the _______________________ hypothesis. (page 3) 10) At times Earth was so warm that even _______________________ had mild temperatures and abundant plant and animal life. (page 3) If you want me to look over your work: A) Type your answers into the MS Word Lesson Review, save and attach your answers to an email and send it to gsimonelli@leffellschool.org. B) Print out the Lesson Review, PDF Version write your answers on the page, attach the photo to an email and send it to the same address. Or you can just look over this page and make sure that you know what the answers are. Your choice. End of Lesson 2 Back to Lesson 1: The Greenhouse Effect Go on to Lesson 3: Melting Polar Ice Jump to Lesson 4: Desert Belts Jump to Lesson 5: Winners and Losers |