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Name: ________________________ Class: ___________________ Date: __________ Earth Science Chapter 13 Section 1 Review Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. How old is Earth? a. 2 billion years b. 4.6 million years c. d. 16 million years 4.56 billion years ____ 2. Which span of geologic time spans covers about 88 percent of Earth’s history? a. Cenozoic c. Paleozoic b. Mesozoic d. Precambrian ____ 3. Some continents contain large core areas of Precambrian rocks called ____. a. plates c. plateaus b. rifts d. shields ____ 4. Which of the following gases was NOT part of Earth’s original atmosphere? a. water vapor c. nitrogen b. oxygen d. carbon dioxide ____ 5. What is the major source of free oxygen in the atmosphere? a. molten rock c. green plants b. water d. silicate minerals ____ 6. According to the Precambrian rock record, much of Earth’s first free oxygen combined with ____. a. potassium c. iron b. silicon d. carbon ____ 7. How far back does the fossil record extend? a. 3 million years b. 560 million years ____ c. d. 1 billion years 3.5 billion years 8. The most common Precambrian fossils are layered mounds of calcium carbonate called ____. a. prokaryotes c. trilobites b. chert d. stromatolites 2 ID: A Name: ________________________ ____ ID: A 9. Figure 13-1 shows the times of appearance and relative abundance of major groups of organisms. According to Figure 13-1, the fossils of which type of organism would be characteristic of the Precambrian era? a. amphibians c. algae b. fishes d. birds Completion Complete each statement. 10. Most Precambrian rocks do not contain ____________________, which makes correlating rock layers difficult. 11. Earth’s original atmosphere was made up mainly of water vapor, carbon dioxide, and ____________________. 12. Many ancient fossils from the Precambrian era are preserved in a hard, dense chemical sedimentary rock called ____________________. 2 Name: ________________________ ID: A Short Answer: Complete TWO questions for FIVE points each. Each additional correct answer is worth one point extra credit. 13. When did the Precambrian Era end? 14. Where does much of our history of Precambrian rocks come from? 15. What are stromatolites? 3 ID: A Earth Science Chapter 13 Section 1 Review Answer Section MULTIPLE CHOICE 1. 2. 3. 4. 5. 6. 7. 8. 9. ANS: ANS: ANS: ANS: ANS: ANS: ANS: ANS: ANS: D D D B C C D D C PTS: PTS: PTS: PTS: PTS: PTS: PTS: PTS: PTS: 1 1 1 1 1 1 1 1 1 DIF: DIF: DIF: DIF: DIF: DIF: DIF: DIF: DIF: L1 L1 L1 L1 L1 L2 L1 L1 L2 OBJ: OBJ: OBJ: OBJ: OBJ: OBJ: OBJ: OBJ: OBJ: 13.1 13.1 13.2 13.2 13.2 13.2 13.3 13.3 13.3 COMPLETION 10. ANS: fossils PTS: 1 11. ANS: nitrogen DIF: L2 OBJ: 13.1 PTS: 1 12. ANS: chert DIF: L1 OBJ: 13.2 PTS: 1 DIF: L2 OBJ: 13.3 SHORT ANSWER 13. ANS: approximately 4 billion years ago PTS: 1 DIF: L1 14. ANS: ores mined from shields OBJ: 13.1 PTS: 1 DIF: L1 OBJ: 13.2 15. ANS: distinctively layered mounds or columns of calcium carbonate that were deposited by algae during the Precambrian Era PTS: 1 DIF: L1 OBJ: 13.3 1