Geology Cafe

Introduction to Geology

Quiz 2 - Basic Geologic Principles

1. Relative dating involves:
a. using radioactivity to find the age of a rock.
b. using the law of superposition to compare the ages of rock layers.
c. comparing fossils found in rock layers.
d. placing events in their proper sequence or order without knowing their exact age in years.
e. b, c and d.

2. Which is not a characteristic of a mineral?
a. naturally occurring inorganic substance
b. have a definite chemical composition
c. have a unique chemical structure.
d. may be composed of a mixture.
e. none of the above.

3. Which is a characteristic of a rock?
a. they may have organic residue components.
b. they may be a mixture of minerals.
c. they may be composed of a single type of mineral.
d. they preserve evidence of the environment in which they form.
e. all of the above.

4. Except for a simply hydrogen atom, the nucleus of atoms are made up of:
a. protons and neutrons
b. neutrons and electrons
c. electrons and protons
d. none of the above

5. Which of the following does not occur as a mineral?
a. gold
b. carbon
c. sulfur
d. iron
e. helium

6. The most abundant element in the Earth’s crust is?
a. oxygen
b. silicon
c. aluminum
d. calcium
e. sodium

7. Minerals classed as “salts”:
a) are held together by covalent bonds
b) are held together by ionic bonds
c) are held together by metallic bonds
d) are held together by Van der Waal bonds
e) none of the above.

8. Mafic rocks are:
a. rocks enriched in iron- and magnesium- silicate minerals.
b. light in color.
c. rich in aluminum.
d. only igneous in origin.
e. none of the above.

9. The relative age of a volcanic intrusion might be determined by:
a) the Law of Original Horizontality
b) the Law of Superposition
c) the Law of Cross-Cutting Relationships
d) the Law of Angular Unconformities

10. A graphic representation of the intersection of the geological features in the subsurface with a vertical plane is called a:
a) geologic map.
b) cross section.
c) geophysical survey.
d) legend.

Extra Credit:

11) The arrow in this view of the Grand Canyon points toward:
Grand Canyon

a) a disconformity
b) an angular unconformity
c) a nonconformity
d) a conformable contact
e) all of the above