LSU GEOG 2051 — EXAM 2 || MOST RECENT EXAM 2026|2027
ACTUAL COMPLETE REAL EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS) ALREADY
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Which type of water makes up approximately 97% of Earth's total
water?
A. Freshwater
B. Groundwater
C. Salt water
D. Atmospheric water Answer: C. Salt water
Rationale: Approximately 97% of Earth's water is saline and found
primarily in the oceans. Only about 3% is freshwater, and much of
that freshwater is stored in glaciers, ice sheets, and groundwater.
Approximately what percentage of Earth's total water is freshwater?
A. 1%
B. 3%
C. 20%
D. 50%
Answer: B. 3%
Rationale: Freshwater represents only about 3% of Earth's total
water. The overwhelming majority—approximately 97%—is salt
water.
What is the primary energy source that drives the hydrologic cycle?
,A. Earth's internal heat
B. Solar energy
C. Tidal energy
D. Wind energy
Answer: B. Solar energy
Rationale: Solar radiation supplies the energy necessary for
evaporation. Evaporation transfers water from Earth's surface into the
atmosphere and initiates many of the processes that redistribute water
around the planet.
What process changes liquid water into water vapor?
A. Condensation
B. Precipitation
C. Evaporation
D. Infiltration
Answer: C. Evaporation
Rationale: Evaporation occurs when liquid water gains enough energy
to become water vapor. Oceans, lakes, rivers, soils, and other wet
surfaces are important sources of evaporated water.
What process changes water vapor into liquid water?
A. Sublimation
B. Condensation
C. Evaporation
D. Runoff
Answer: B. Condensation
,Rationale: Condensation occurs when water vapor cools and changes
into liquid water. It is essential to cloud formation and therefore plays
an important role in the hydrologic cycle.
What is sublimation?
A. The conversion of liquid water into ice
B. The conversion of water vapor into liquid water
C. The direct conversion of ice into water vapor
D. The movement of groundwater toward the ocean
Answer: C. The direct conversion of ice into water vapor
Rationale: Sublimation is a phase change in which a solid changes
directly into a gas without passing through the liquid phase. Ice and
snow can therefore become water vapor directly under appropriate
atmospheric conditions.
What is infiltration?
A. Water moving from the atmosphere to Earth's surface
B. Water entering the soil from the ground surface
C. Water evaporating from vegetation
D. Water flowing through a river channel
Answer: B. Water entering the soil from the ground surface
Rationale: Infiltration occurs when water at Earth's surface enters the
soil. The rate of infiltration depends on factors such as soil type,
vegetation, slope, precipitation intensity, and soil moisture.
What is percolation?
, A. The downward movement of water through soil and rock
B. The upward movement of groundwater
C. The evaporation of groundwater
D. The movement of water through the atmosphere
Answer: A. The downward movement of water through soil and rock
Rationale: Percolation refers to water moving downward through pore
spaces in soil and rock. This process helps replenish groundwater
reservoirs.
What is groundwater?
A. Water permanently stored in glaciers
B. Water located beneath Earth's surface in saturated materials
C. Water found only in rivers
D. Water vapor in the atmosphere
Answer: B. Water located beneath Earth's surface in saturated
materials
Rationale: Groundwater is water stored below the surface within
pores, fractures, and other openings in soil and rock. It is an important
component of Earth's freshwater supply.
What is runoff?
A. Water flowing over Earth's surface toward a drainage system
B. Water stored permanently in glaciers
C. Water vapor rising from vegetation
D. Groundwater moving through an aquifer
ACTUAL COMPLETE REAL EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS) ALREADY
GRADED A+ | GUARANTEED SUCCESS!! NEWEST EXAM
| JUST RELEASED!!
Which type of water makes up approximately 97% of Earth's total
water?
A. Freshwater
B. Groundwater
C. Salt water
D. Atmospheric water Answer: C. Salt water
Rationale: Approximately 97% of Earth's water is saline and found
primarily in the oceans. Only about 3% is freshwater, and much of
that freshwater is stored in glaciers, ice sheets, and groundwater.
Approximately what percentage of Earth's total water is freshwater?
A. 1%
B. 3%
C. 20%
D. 50%
Answer: B. 3%
Rationale: Freshwater represents only about 3% of Earth's total
water. The overwhelming majority—approximately 97%—is salt
water.
What is the primary energy source that drives the hydrologic cycle?
,A. Earth's internal heat
B. Solar energy
C. Tidal energy
D. Wind energy
Answer: B. Solar energy
Rationale: Solar radiation supplies the energy necessary for
evaporation. Evaporation transfers water from Earth's surface into the
atmosphere and initiates many of the processes that redistribute water
around the planet.
What process changes liquid water into water vapor?
A. Condensation
B. Precipitation
C. Evaporation
D. Infiltration
Answer: C. Evaporation
Rationale: Evaporation occurs when liquid water gains enough energy
to become water vapor. Oceans, lakes, rivers, soils, and other wet
surfaces are important sources of evaporated water.
What process changes water vapor into liquid water?
A. Sublimation
B. Condensation
C. Evaporation
D. Runoff
Answer: B. Condensation
,Rationale: Condensation occurs when water vapor cools and changes
into liquid water. It is essential to cloud formation and therefore plays
an important role in the hydrologic cycle.
What is sublimation?
A. The conversion of liquid water into ice
B. The conversion of water vapor into liquid water
C. The direct conversion of ice into water vapor
D. The movement of groundwater toward the ocean
Answer: C. The direct conversion of ice into water vapor
Rationale: Sublimation is a phase change in which a solid changes
directly into a gas without passing through the liquid phase. Ice and
snow can therefore become water vapor directly under appropriate
atmospheric conditions.
What is infiltration?
A. Water moving from the atmosphere to Earth's surface
B. Water entering the soil from the ground surface
C. Water evaporating from vegetation
D. Water flowing through a river channel
Answer: B. Water entering the soil from the ground surface
Rationale: Infiltration occurs when water at Earth's surface enters the
soil. The rate of infiltration depends on factors such as soil type,
vegetation, slope, precipitation intensity, and soil moisture.
What is percolation?
, A. The downward movement of water through soil and rock
B. The upward movement of groundwater
C. The evaporation of groundwater
D. The movement of water through the atmosphere
Answer: A. The downward movement of water through soil and rock
Rationale: Percolation refers to water moving downward through pore
spaces in soil and rock. This process helps replenish groundwater
reservoirs.
What is groundwater?
A. Water permanently stored in glaciers
B. Water located beneath Earth's surface in saturated materials
C. Water found only in rivers
D. Water vapor in the atmosphere
Answer: B. Water located beneath Earth's surface in saturated
materials
Rationale: Groundwater is water stored below the surface within
pores, fractures, and other openings in soil and rock. It is an important
component of Earth's freshwater supply.
What is runoff?
A. Water flowing over Earth's surface toward a drainage system
B. Water stored permanently in glaciers
C. Water vapor rising from vegetation
D. Groundwater moving through an aquifer
