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WGU D199 Test Prep: Introduction to Physical Science - Verified Answers & Rationale

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WGU D199 Test Prep: Introduction to Physical Science - Verified Answers & Rationale

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1. Which of the following would be a subject of study in physical
geography?
• A) The movement of people from one country to another
• B) The development of transportation systems
• C) The formation of mountains and volcanoes
• D) The distribution of languages across the world
Answer: C) The formation of mountains and volcanoes
Rationale: Physical geography explores natural phenomena, including
the formation of mountains, volcanoes, and landforms.


2. Which of the following is an example of an abiotic factor in an
ecosystem?
• A) A plant
• B) A predator
• C) Soil composition
• D) A microorganism
Answer: C) Soil composition
Rationale: Abiotic factors refer to non-living components of an
ecosystem, such as soil, water, air, and temperature, which influence the
environment.

,3. A "population pyramid" is used to represent:
• A) The geographic distribution of a population
• B) The age and sex distribution of a population
• C) The migration patterns of a population
• D) The economic activities of a population
Answer: B) The age and sex distribution of a population
Rationale: A population pyramid visually displays the age and sex
structure of a population, helping to analyze demographic trends.


4. Which of the following best describes the "Tropic of Cancer"?
• A) A line of latitude located at 0°
• B) A line of longitude that divides the Earth into Eastern and
Western Hemispheres
• C) A line of latitude located at 23.5° North
• D) A line of longitude located at 180°
Answer: C) A line of latitude located at 23.5° North
Rationale: The Tropic of Cancer is a line of latitude located at 23.5°
North of the Equator, marking the northernmost point where the sun
can appear directly overhead.


5. Which of the following would be a major topic studied by a physical
geographer?
• A) The distribution of languages

, • B) The development of transportation networks
• C) The movement of tectonic plates
• D) The impact of colonialism on societies
Answer: C) The movement of tectonic plates
Rationale: Physical geography focuses on natural processes like the
movement of tectonic plates, which shape the Earth's surface and lead
to phenomena like earthquakes and volcanoes.


6. The term "global warming" refers to:
• A) The cooling of the Earth's atmosphere over time
• B) A temporary rise in the Earth's temperature due to volcanic
activity
• C) The gradual increase in the Earth's average temperature due to
human activities
• D) The reduction in the Earth's temperature caused by the
melting of glaciers
Answer: C) The gradual increase in the Earth's average temperature
due to human activities
Rationale: Global warming refers to the long-term increase in the
Earth's average temperature, primarily caused by human activities such
as burning fossil fuels.


7. The "Rainshadow Effect" occurs when:

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