GEOG 103 Physical Geography Exam – 40 Questions with Answers | Earth Systems, Atmosphere, Solar Radiation & Global Circulation (2026) | University of Nevada Las Vegas

This document contains approximately 40 exam-style questions with verified answers designed to help students prepare for GEOG 103 Physical Geography examinations at the University of Nevada, Las Vegas (UNLV). The material reviews fundamental concepts in Earth system science, atmospheric processes, geographic coordinates, solar radiation, and global circulation patterns. The questions are presented in a clear question-and-answer format that allows students to quickly review key physical geography principles, definitions, and scientific concepts commonly assessed in introductory geography courses. The study material begins with foundational geographic concepts such as spatial analysis, geographic coordinates, and Earth’s shape and dimensions. Students review how latitude and longitude are used to identify locations on Earth and how meridians measure distance east or west of the prime meridian. The document also explains the physical characteristics of Earth, including the fact that the equatorial diameter is slightly larger than the polar diameter due to the planet’s rotational bulge. These topics establish the geographic framework used to analyze physical processes occurring on Earth’s surface. Another key section focuses on Earth–Sun relationships and solar radiation, which play a central role in controlling climate and atmospheric processes. The guide explains the distribution of electromagnetic radiation across wavelengths—from X-rays and ultraviolet radiation to visible light and infrared radiation—and identifies infrared radiation as the dominant wavelength emitted by Earth. Concepts such as sun altitude, the subsolar point, seasonal variation in day length, and the influence of Earth’s tilt on solstices and equinoxes are also reviewed to help students understand the mechanics behind seasonal climate patterns. The document also introduces atmospheric composition and structure, explaining how the atmosphere is classified based on composition, temperature, and function. Important atmospheric phenomena discussed include ozone chemistry, ultraviolet radiation, and the role of chlorofluorocarbons (CFCs) in ozone depletion. The material describes how interactions between ultraviolet radiation and pollutants can produce photochemical smog, illustrating how human activities influence atmospheric chemistry and environmental conditions. Additional topics address energy balance and heat transfer within Earth’s atmosphere. The guide explains how incoming solar radiation and outgoing infrared radiation create a global energy balance that varies by latitude. It also discusses mechanisms of heat transfer including conduction, radiation, and convection, as well as the concept of specific heat, which describes the capacity of substances to store thermal energy. These concepts help students understand how temperature differences develop between land, water, and the atmosphere. The material further explores weather and atmospheric circulation patterns. Students review concepts such as heat waves, pressure systems, katabatic winds, and mountain-valley breeze circulation. The guide also explains global atmospheric circulation patterns such as Hadley cells, which drive rising air near the Intertropical Convergence Zone (ITCZ) and descending air in the subtropics. These large-scale circulation systems are essential for understanding global climate zones and regional weather patterns. Other environmental topics covered in the study guide include acid deposition, global temperature changes associated with the enhanced greenhouse effect, and citizen science approaches that involve public participation in scientific data collection and monitoring. These subjects demonstrate how environmental processes and human activities interact within Earth’s systems and highlight the importance of scientific monitoring in understanding environmental change. The content aligns with topics commonly taught in introductory physical geography courses and supports study alongside widely used textbooks such as Geosystems: An Introduction to Physical Geography by Robert W. Christopherson and Physical Geography by James F. Petersen. Reviewing these questions helps students strengthen their understanding of Earth systems, atmospheric science, climate processes, and geographic analysis. This document may be useful for students enrolled in courses such as: GEOG 103 Physical Geography Introduction to Physical Geography Earth System Science Climate and Atmospheric Processes Environmental Geography It is particularly relevant for geography students, environmental science majors, earth science students, climate science students, and general education learners preparing for university exams or coursework related to physical geography, atmospheric science, and Earth system processes. Keywords geog 103 physical geography exam questions unlv, earth sun relationships solar radiation geography, latitude longitude meridians geographic coordinates, spatial analysis geographic inquiry methods, electromagnetic spectrum x rays ultraviolet visible infrared, ozone depletion chlorofluorocarbons atmospheric chemistry, photochemical smog air pollution geography, earth energy balance shortwave longwave radiation, heat transfer conduction convection radiation geography, specific heat temperature control climate, hadley cell atmospheric circulation itcz, katabatic winds mountain valley breeze circulation, greenhouse effect global temperature change geography, acid deposition environmental impacts geography