COLORADO GEOLOGICAL TECHNICIAN
CERTIFICATION EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) Q&A 2026
|INSTANT DOWNLOAD PDF
1. What is the primary focus of a geological technician in the
field?
A. Performing surgery on fossil specimens
B. Collecting, recording, and analyzing geological data
C. Designing buildings and infrastructure
D. Operating mining explosives
Rationale: Geological technicians mainly support geologists by
collecting field data, sampling, and recording observations.
Correct Answer: B
2. Which mineral property is best used to identify minerals in
hand samples?
A. Radioactivity
B. Color alone
C. Hardness, streak, and cleavage
D. Temperature
Rationale: Physical properties like hardness, streak, and
cleavage are reliable for mineral identification.
Correct Answer: C
,3. The Mohs scale measures which mineral property?
A. Density
B. Hardness
C. Crystal shape
D. Magnetism
Rationale: The Mohs scale ranks minerals based on their
resistance to scratching.
Correct Answer: B
4. Which rock type is formed from cooled magma or lava?
A. Sedimentary
B. Metamorphic
C. Igneous
D. Organic
Rationale: Igneous rocks form from solidification of molten
material.
Correct Answer: C
5. What is the main component of granite?
A. Quartz, feldspar, and mica
B. Calcite only
C. Clay and silt
D. Coal and organic matter
,Rationale: Granite is a felsic igneous rock composed mainly of
quartz and feldspar.
Correct Answer: A
6. Which process forms sedimentary rocks?
A. Melting and cooling
B. Heat and pressure only
C. Compaction and cementation of sediments
D. Vaporization
Rationale: Sedimentary rocks form through lithification of
sediments.
Correct Answer: C
7. What is metamorphism?
A. Weathering of rocks at the surface
B. Transformation of rocks by heat and pressure
C. Melting of magma
D. Formation of sediment layers
Rationale: Metamorphism alters rock structure without
melting.
Correct Answer: B
8. Which mineral is the hardest naturally occurring substance?
, A. Quartz
B. Feldspar
C. Diamond
D. Calcite
Rationale: Diamond ranks highest on the Mohs hardness scale.
Correct Answer: C
9. Which of the following is an example of a sedimentary
rock?
A. Basalt
B. Marble
C. Sandstone
D. Gneiss
Rationale: Sandstone forms from compacted sand particles.
Correct Answer: C
10. What does stratigraphy study?
A. Earth’s atmosphere
B. Layers of rock and their relationships
C. Ocean currents
D. Weather patterns
Rationale: Stratigraphy focuses on rock layer formation and
sequence.
Correct Answer: B
CERTIFICATION EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) Q&A 2026
|INSTANT DOWNLOAD PDF
1. What is the primary focus of a geological technician in the
field?
A. Performing surgery on fossil specimens
B. Collecting, recording, and analyzing geological data
C. Designing buildings and infrastructure
D. Operating mining explosives
Rationale: Geological technicians mainly support geologists by
collecting field data, sampling, and recording observations.
Correct Answer: B
2. Which mineral property is best used to identify minerals in
hand samples?
A. Radioactivity
B. Color alone
C. Hardness, streak, and cleavage
D. Temperature
Rationale: Physical properties like hardness, streak, and
cleavage are reliable for mineral identification.
Correct Answer: C
,3. The Mohs scale measures which mineral property?
A. Density
B. Hardness
C. Crystal shape
D. Magnetism
Rationale: The Mohs scale ranks minerals based on their
resistance to scratching.
Correct Answer: B
4. Which rock type is formed from cooled magma or lava?
A. Sedimentary
B. Metamorphic
C. Igneous
D. Organic
Rationale: Igneous rocks form from solidification of molten
material.
Correct Answer: C
5. What is the main component of granite?
A. Quartz, feldspar, and mica
B. Calcite only
C. Clay and silt
D. Coal and organic matter
,Rationale: Granite is a felsic igneous rock composed mainly of
quartz and feldspar.
Correct Answer: A
6. Which process forms sedimentary rocks?
A. Melting and cooling
B. Heat and pressure only
C. Compaction and cementation of sediments
D. Vaporization
Rationale: Sedimentary rocks form through lithification of
sediments.
Correct Answer: C
7. What is metamorphism?
A. Weathering of rocks at the surface
B. Transformation of rocks by heat and pressure
C. Melting of magma
D. Formation of sediment layers
Rationale: Metamorphism alters rock structure without
melting.
Correct Answer: B
8. Which mineral is the hardest naturally occurring substance?
, A. Quartz
B. Feldspar
C. Diamond
D. Calcite
Rationale: Diamond ranks highest on the Mohs hardness scale.
Correct Answer: C
9. Which of the following is an example of a sedimentary
rock?
A. Basalt
B. Marble
C. Sandstone
D. Gneiss
Rationale: Sandstone forms from compacted sand particles.
Correct Answer: C
10. What does stratigraphy study?
A. Earth’s atmosphere
B. Layers of rock and their relationships
C. Ocean currents
D. Weather patterns
Rationale: Stratigraphy focuses on rock layer formation and
sequence.
Correct Answer: B
