Cochise College
Physical Geology GLG 101- Pre Test
Circle a single letter for each question.
Name: ______________________________________ Date: _______________
Instructor: _________________________ Campus: _______________________
1. On the Mohs scale of hardness, apatite has a hardness of ____
a. 7
b. 5
c. 4
d. 3
2. An aphanitic igneous rock is
a. porphyritic
b. coarse-grained
c. fine-grained
d. glassy
3. Which of the following is not an igneous rock?
a. granite
b. graywacke
c. gabbro
d. obsidian
4. A maar is
a. volcanic dome of extruded rhyolite
b. a flood basalt
c. a volcanic crater formed by an explosion
d. a small parasitic cone on top of a shield volcano
5. Exfoliation occurs when
a. feldspar breaks down into clay
b. shale breaks down into clay
c. the outer surface of a granite boulder breaks off
d. a metamorphic rock, such as slate, splits into layers
6. Which of the following is an evaporite?
a. gypsum
b. shale
c. siltstone
d. anthracite
7. Which of the following metamorphic rocks is non-foliated?
a. marble
b. slate
c. phyllite
d. gneiss
8. Absolute geologic time cannot be determined by
a. tree rings
b. carbon-14 technique
c. fossils
d. potassium-argon technique
9. Which of the following is not a form of mass wastage?
a. slump
b. creep
c. debris flow
d. sheet wash
10. Saltation is
a. a bouncing and skipping motion
b. the process of fresh water becoming salty
c. how well a substance floats (density)
d. the evaporation of saltwater
11. An artesian well
a. is a well that has been dug by an artesian
b. has over-pressured water and flows out to the surface
c. produces only brackish water
d. only flows part of the year
12. An esker is
a. a small glacial lake
b. a streamlined hill shaped by a glacier
c. a glacial groove made in soft limestone
d. a sinuous ridge of gravel
13. A ventifact is
a. a rounded pebble shaped by wave action
b. a volcanic bomb
c. a sand-blasted rock
d. a rock scratched by glacial action
14. A barchan is
a. a sand dune
b. an ephemeral stream
c. a gravel bar in a stream channel
d. a deposit of gravel at the base of a mountain
15. The fastest moving seismic wave is
a. F wave
b. P wave
c. S wave
d. X wave
16. The outer core of the earth is
a. solid
b. liquid
c. made of high density silicates
d. made of low density silicates
17. In a reverse fault the headwall block moves
a. up dip
b. down dip
c. along the strike line
d. at a 45 degree angle between the strike line and dip direction
18. Which of the following does not have an active subduction zone beneath it?
a. the Hawaiian islands
b. the Aleutian islands
c. the Japanese islands
d. the Andes mountains of South America
19. Which of the following minerals is not on Bowen’s reaction series?
a. pyroxene
b. biotite
c. calcite
d. muscovite
20. Glossopteris is a
a. fish
b. plant
c. flying reptile
d. trilobite