Quizlet vocabulary






CH 13 Practice Test Answers

Answer to topic 13 (these are the quesiitons within the text)

1.4
2.1
3.1
4.2
5. Use index fossils or radioactive decay dating to indicate that the age of the rocks gets younger towards the top
6.2
7.1
8.3
9.3
10. lived for a short time or a small vertical extent, has a wide horizontal distribution and is a single species of life
11. limestone in the particles
12.4
13.1
14.4
15.2
16.3
17.4
18.2
19.2
20. sedimentary rocks form near Earth's surface and most igneous and metamorphic rocks don't. The high heat and pressure associated with igneous and metamorphic rock would destroy any evidence of life.
21.The rocks in Elmira are Devonian in age and are thus too old; the Mesozoic Era is the age of dinosaurs and there are no rocks of that age in Elmira.
22.4
23.1
24.2
25.3
26.1
27.4
28.1
29.3
30.2
31.2
32.3
33.3
34.3
35.2
36. Scientific principles generally remain the same with time, thus we can interpret the past through an understanding of the present.
37.3
38.4
39.2
40.2
41.2
42.4
43.3
44.4
45.1
46. Carbon-14 has such a short half life that too little would be left to measure in Ordocivician age (444 million to 488 million years old) fossils.
47. 1
48. 4
49. Free oxygen started to build up in the Earth's atmosphere.
50. 3
51. 1
52. 1

Regents Practice (Ch 13) - These are the answers to the practice questions at the end of the chapter ....p296

1.1
2.1
3,4
4.2
5.2
6.1
7.2
8.3
9.4
10.2
11.2
12.1
13.1
14.3
15.3
16. use of index fossils, radioactive decay dating, and correlation by matching sequences of rock layers.
17. (this is a drawing question)
18. The limestone layers protrude farther. There is less evidence of erosion to the limestone layers
19. 542 million years
20. Paleozoic Era and Carboniferous or Pennsylvanian Period
21. Photosynthetic life forms, plants and/or bacteria
22. can cause isolation of land areas resulting in independent evolution, can cause an increase of marine environments compared to land envrionments
23. During the Sulurian period, this are was hot and dry and there was much evaporation of an ocean or sea forming salt and gypsum. Today, the conditions are warm and humid.
24. A dust cloud caused by the impact cooled the Earth resulting in an Ice Age; fires from the impact burned much of the Earth's surface; acid precipitation killed most of the vegetation.
25. Earth was likely melted or largely melted at this time and gravity