Earth Science
Name:
Chapter Six--Worksheet Review # 1
Class Period:
Section One: [Pages 134-141]
Directions: Use your textbook and notes to assist you with answering the following questions.
1.
outlined uniformitarianism, the main principle of modern geology.
2. The principle of uniformitarianism states that
.
a. the Earth changed only at certain points throughout its history.
b. the Earth changed more in its past than in its present.
c. the same geologic processes shaping the Earth today have been at work throughout Earth’s history.
3. What phrase summarizes uniformitarianism?
4. Number the following geologic processes in the correct sequence:
Rivers carry rock particles downstream.
In time, new rock will be uplifted and create new landforms.
Rock particles are deposited and form new layers of sediment.
Natural forces break down rock into smaller particles.
5. Why didn’t other scientists immediately accept the theory of uniformitarianism?
6. The common belief concerning geologic change during Hutton’s time was called
.
7. The works of Charles Lyell, published from 1830 to 1833, were titled 7 . These works
successfully challenged the theory of 8 .
8.
9. What present-day evidence suggests that the extinction of dinosaurs is the result of a catastrophic event?
10. Modern geology is considered a
between catastrophism and uniformitarianism.
a. happy medium
b. contrast
c. difference
d. choice
11. What two clues do scientists use to study the Earth’s history?
1.
2.
12. Determining the age of objects or events in relation to other objects or events is
called
.
13. As long as a sequence of rock layers is undisturbed, scientists know that 13 rocks lie
above 14 rocks.
14.
15. How did geologists create the geologic column?
16. Why is a crosscutting feature always younger than the rock layers it cuts across?
17. Choose the term in Column B that best matches the description in Column A, and write your answer in the space provided.
18. True or False?--When a layer or several layers of rock are missing from a rock layer sequence, the gaps are
called unconformities.
19. Name two possible explanations for a missing layer in a rock layer sequence.
1.
2.
20. From Figure 6, an unconformity is called
if the missing layer was never actually
present.
21. Nondeposition occurs when the supply of 21 stops at some point and then restarts.
22 causes an unconformity when an area is exposed to water, wind, or other elements.
22.
23. Choose the term in Column B that best matches the description in Column A, and write your answer in the space provided.
Terms may be used more than once.
24. Identify three things that geologists use to figure out the rock-layer puzzle?
1.
2.
3.