ERSC181 Final Review 2026 –
Comprehensive Geology Exam Questions
and Answers
Description:
Master your geology revision with this updated 2026 ERSC181 Final Review, featuring
carefully curated exam questions, detailed answers, and clear explanations. Outdated content has
been removed, and new high-value case-based questions on climate change, natural hazards,
GIS, and sustainability have been added to meet the latest standards. Perfect for students aiming
to excel in Earth Science exams.
Download now and get the ultimate edge in your geology preparation!
,ERSC181 Final Review 2026 – Updated Geology Exam Questions
with Answers
1. The nucleus is composed of which two subatomic particles?
a) Protons and electrons
b) Protons and neutrons
c) Neutrons and electrons
d) Protons only
Answer: b) Protons and neutrons
Explanation: The nucleus of an atom contains protons (positively charged) and neutrons
(neutral). Electrons orbit outside the nucleus.
2. Of the top elements present on Earth, which of the following is found in the smallest
quantity?
a) Calcium
b) Iron
c) Magnesium
Answer: c) Magnesium
Explanation: Magnesium is less abundant in the Earth's crust compared to calcium and
iron.
3. These minerals readily dissolve in slightly acidic water:
a) Silicates
b) Carbonates
c) Oxides
d) Sulfides
Answer: b) Carbonates
Explanation: Carbonate minerals like calcite react easily with acidic water, which is why
limestone weathers quickly.
, 4. The tendency of a mineral to break along certain planes to make smooth surfaces is
called:
a) Fracture
b) Luster
c) Cleavage
d) Hardness
Answer: c) Cleavage
Explanation: Cleavage describes how minerals split along flat planes due to their atomic
structure.
5. A silicate tetrahedron is composed of:
a) One silicon atom and four oxygen atoms
b) Four silicon atoms and one oxygen atom
c) One silicon atom and three oxygen atoms
d) Two silicon and two oxygen atoms
Answer: a) One silicon atom and four oxygen atoms
Explanation: The basic building block of silicate minerals is the SiO₄ tetrahedron, with
silicon at the center bonded to four oxygen atoms.
6. Which subatomic particle is NOT found in the nucleus?
a) Proton
b) Neutron
c) Electron
d) Positron
Answer: c) Electron
Explanation: Electrons orbit the nucleus in shells; only protons and neutrons are located
inside the nucleus.
7. Which two elements are the scarcest in the crust?
a) Potassium and magnesium
Comprehensive Geology Exam Questions
and Answers
Description:
Master your geology revision with this updated 2026 ERSC181 Final Review, featuring
carefully curated exam questions, detailed answers, and clear explanations. Outdated content has
been removed, and new high-value case-based questions on climate change, natural hazards,
GIS, and sustainability have been added to meet the latest standards. Perfect for students aiming
to excel in Earth Science exams.
Download now and get the ultimate edge in your geology preparation!
,ERSC181 Final Review 2026 – Updated Geology Exam Questions
with Answers
1. The nucleus is composed of which two subatomic particles?
a) Protons and electrons
b) Protons and neutrons
c) Neutrons and electrons
d) Protons only
Answer: b) Protons and neutrons
Explanation: The nucleus of an atom contains protons (positively charged) and neutrons
(neutral). Electrons orbit outside the nucleus.
2. Of the top elements present on Earth, which of the following is found in the smallest
quantity?
a) Calcium
b) Iron
c) Magnesium
Answer: c) Magnesium
Explanation: Magnesium is less abundant in the Earth's crust compared to calcium and
iron.
3. These minerals readily dissolve in slightly acidic water:
a) Silicates
b) Carbonates
c) Oxides
d) Sulfides
Answer: b) Carbonates
Explanation: Carbonate minerals like calcite react easily with acidic water, which is why
limestone weathers quickly.
, 4. The tendency of a mineral to break along certain planes to make smooth surfaces is
called:
a) Fracture
b) Luster
c) Cleavage
d) Hardness
Answer: c) Cleavage
Explanation: Cleavage describes how minerals split along flat planes due to their atomic
structure.
5. A silicate tetrahedron is composed of:
a) One silicon atom and four oxygen atoms
b) Four silicon atoms and one oxygen atom
c) One silicon atom and three oxygen atoms
d) Two silicon and two oxygen atoms
Answer: a) One silicon atom and four oxygen atoms
Explanation: The basic building block of silicate minerals is the SiO₄ tetrahedron, with
silicon at the center bonded to four oxygen atoms.
6. Which subatomic particle is NOT found in the nucleus?
a) Proton
b) Neutron
c) Electron
d) Positron
Answer: c) Electron
Explanation: Electrons orbit the nucleus in shells; only protons and neutrons are located
inside the nucleus.
7. Which two elements are the scarcest in the crust?
a) Potassium and magnesium
