ATOC 1050 EXAM QUESTIONS WITH VERIFIED ANSWERS LATEST UPDATE 2026

ATOC 1050 EXAM QUESTIONS WITH VERIFIED ANSWERS LATEST UPDATE 2026 1. How does atmospheric pressure change with altitude? a. Pressure decreases linearly with altitude. b. Pressure increases linearly with altitude. c. Pressure decreases exponentially with altitude. d. Pressure increases exponentially with altitude. - Answers C True/False: Reflection is the process whereby light encounters an object and leaves in a larger number of weaker rays, traveling in different directions. a. True b. False - Answers B False How does the saturation vapor pressure of an air parcel relate to its temperature? a. As the temperature increases, the saturation vapor pressure decreases. b. As the temperature increases, the saturation vapor pressure increases. c. They are independent of each other. - Answers B An air parcel is unsaturated. The relative humidity of this parcel is _____. a. There is not enough information to answer this question. b. more than 100% c. 100% d. less than 100% - Answers D One would expect near-ground temperatures to be coldest when the night is _____. a. cloudy b. clear and windy c. clear and calm - Answers C Assuming the day and night are clear and calm, when would you expect the minimum daily temperature to occur? a. At midnight b. At noon c. Just before sunrise d. In the late afternoon - Answers C Which cloud form appears as globular individual cloud masses with flat bases and fluffy tops? a. Cumulus b. Stratus c. Cirrus - Answers A Which of the following phase changes warm the atmosphere? a. Melting, evaporation and sublimation b. Freezing, condensation and deposition c. Sublimation and deposition d. Melting and freezing - Answers B In which layers of the atmosphere does temperature generally decrease with height? a. In the troposphere and the stratosphere b. In the troposphere and the mesosphere c. In the stratosphere and the thermosphere - Answers B True/False: As temperature increases, kinetic energy increases. a. True b. False - Answers A Which of the following mechanisms enhances the stability of the atmosphere? a. General lifting of air due to processes such as orographic lifting, frontal wedging, and convergence. b. The heating of an air mass from below as it moves over a warm surface. c. Radiative cooling of the Earth's surface after sunset. - Answers C What would happen to the average surface temperature of the Earth if we decreased the amount of greenhouse gases in the atmosphere? a. The average surface temperature of the Earth would decrease. b. The average surface temperature of the Earth would increase. c. The average surface temperature of the Earth is not affected by the amount of greenhouse gases. - Answers A Which type of fog forms when an air mass is blown over a cold surface and cools down to its dew point temperature, where condensation occurs? a. Radiation fog b. Frontal fog c. Upslope fog d. Advection fog - Answers D City A is located at 1,000 feet above sea level and City B is located at 5,000 feet above sea level. All other temperature controls aside, which city will have a colder yearly average temperature? a. City A b. City B c. The yearly average temperature does not depend on altitude. - Answers B The air parcel above has a temperature of 30°C. Its dew point temperature is 10°C. Assume a dry adiabatic lapse rate of 10°C/km. At which height will the base of a cumulus cloud form? a. 0 km b. 1 km c. 2 km d. No cloud will form. - Answers C Dew is an example of what kind of phase change? a. Deposition b. Evaporation c. Condensation - Answers C When is it appropriate to use the dry adiabatic lapse rate? a. When an air parcel is saturated. b. When the temperature of an air parcel equals the dew point temperature. c. When the water vapor pressure of an air parcel is less than the saturation vapor pressure. - Answers C Why do sunsets and sunrises often appear red? a. The sunlight that passes through the atmosphere heats it up and this radiation causes the atmosphere to appear red. b. When the Sun is low on the horizon, only the longwave radiation from the Sun can pass through the atmosphere. c. When the sunlight passes through the atmosphere, the blue light is scattered, leaving only the red light. - Answers C What is 40°C in degrees Fahrenheit and in Kelvin? a. 104°F and 313.15 K b. 104°F and 377.15 K c. 22.2°F and 22.2 K d. 40°F and 313.15 K - Answers A The atmosphere above is a/an ____ atmosphere. a. Unstable b. Stable c. There is not enough information to answer this question. - Answers A Where is the ozone hole located? a. Above the North Pole b. Above Antarctica c. Above Siberia d. The ozone hole does not exist. - Answers B Which of the following has the highest albedo? a. A dense forest b. A snow-covered field c. The Pacific Ocean d. An asphalt parking lot - Answers B The diurnal range of temperature is greatest _____. a. 100 m above the ground b. 2 m above the ground c. 10 m below the ground d. 500 m above the ground - Answers B What is the process by which ice crystals in a cloud grow at the expense of the surrounding water droplets? a. The Moist Adiabatic Process b. The Collision-Coalescence Process c. The Bergeron Process - Answers C What is 298.15 K in degrees Celsius and degrees Fahrenheit? a. 25°C and 0°F b. 0°C and 32°F c. 25°C and 77°F d. 35°C and 95°F - Answers C The figure above shows the temperature (top line) and the dew point temperature (bottom line) observations from the Duane weather station in Boulder on September 27th, 2016. At what time was the relative humidity at a minimum? a. 00:00 b. 05:00 c. 18:00 d. 23:00 - Answers C In which layer of the atmosphere is the ozone located that absorbs most of the Sun's ultraviolet light and protects us from sunburns? a. Troposphere b. Stratosphere c. Mesosphere d. Thermosphere - Answers B Increasing the amount of water vapor in an air parcel will increase the ____________ of the air parcel. a. relative humidity b. water vapor pressure c. Both a and b are correct - Answers C Which of the following statements is true (assuming that the water vapor content of an air parcel remains constant)? a. As the temperature of an air parcel decreases, its relative humidity increases. b. As the temperature of an air parcel decreases, its relative humidity decreases. c. Temperature changes do not affect relative humidity. - Answers A True/False: Unlike clouds, which form by rising air that is adiabatically cooling, most fog is formed by cooling the air parcel or adding enough water vapor to cause saturation. a. True b. False - Answers A The movement of the Earth around its own axis is called ____. a. aphelion b. rotation c. inclination of the axis d. revolution - Answers B The altitude at which a parcel reaches saturation and cloud formation begins is known as the _____. a. lifting condensation level b. dry adiabatic lapse rate c. cloud condensation nucleus - Answers A During the _____, Antarctica experiences 12 hours of day and 12 hours of night. a. vernal equinox b. summer solstice c. winter solstice - Answers A We have seasons on Earth because _____. a. the Earth's axis is tilted b. the Earth moves around the Sun in an elliptical orbit c. the Earth rotates around its own axis - Answers A The water in my tea kettle is boiling and I want to remove it from the stove. Because I lost my oven mitt I pick up the kettle with my bare hands and burn them badly. What type of heat transfer is burning my hands? a. Convection b. Conduction c. Radiation - Answers B Denver's average yearly temperature is 50.15°F. Is this an example of weather or climate? a. Weather b. Climate c. There is not enough information to answer this question. - Answers B What do we call the process whereby air is forced over a mountain range? a. Topographic lift b. Convection c. Frontal wedging d. Convergence - Answers A True/False: For a cloud to form, the air must be unsaturated and contain cloud condensation nuclei. a. True b. False - Answers B An air parcel has a temperature of 25°C and is located on the western side of a mountain. Initially, the parcel is at 0 km above sea level. Then, the parcel is forced over the top of the mountain with an elevation of 3 km above sea level. The dew point temperature of the parcel is 5°C. Assume the dew point temperature remains constant as long as the parcel is unsaturated. The dry adiabatic lapse rate is 10°C/km and the moist adiabatic lapse rate is 7°C/km. What is the temperature of the air parcel at the top of the mountain? a. 0°C b. -2°C c. -5°C - Answers B True/False: The temperature of an air parcel is 60°F and the dew point temperature is 55°F. The parcel is unsaturated. a. True b. False - Answers A I wash my hair and go outside with wet hair. As my hair dries, my head starts to get chilly. This is an example of which phase change? a. Deposition b. Sublimation c. Evaporation d. Condensation - Answers C Which are the two most abundant gases in the Earth's atmosphere? a. Carbon dioxide and oxygen b. Oxygen and nitrogen c. Water vapor and nitrogen - Answers B The figure above shows the temperature (top line) and the dew point temperature (bottom line) observations from the Duane weather station in Boulder on May 9th, 2016. What is the temperature maximum, temperature minimum, and daily temperature range? a. 59°F; 42°F; 17°F b. 68°F; 42°F; 55°F c. 68°F; 42°F; 26°F - Answers C Which form of heat is associated with the phase changes of water? a. Latent heat b. Diabatic heat c. Sensible heat - Answers A During an adiabatic process, what will happen to an air parcel that is lifted up in the atmosphere? a. It will expand and warm. b. It will compress and warm. c. It will expand and cool. d. It will compress and cool - Answers C How do clouds impact the Earth's surface temperature during the day? a. They have a cooling effect. b. They have a warming effect. c. They can have a cooling or a warming effect, depending on the cloud type. - Answers C True/False: An isotherm is a line that connects points on a map that have the same pressure and therefore indicates areas of high and low pressure. a. True b. False - Answers B During a surface temperature inversion, the environmental temperature _____. a. increases with altitude. b. decreases with altitude. c. remains constant with altitude. - Answers A Which type of cloud undergoes the largest vertical development? a. Stratocumulus b. Altostratus c. Cirrocumulus d. Cumulonimbus - Answers D True/False: The Sun emits most of its radiation in the shortwave spectrum and the Earth emits most of its radiation in the longwave spectrum. a. True b. False - Answers A True/False: The Coriolis force is the force that causes the wind to blow. a) True b) False - Answers B Assume you have a high pressure system in the Southern Hemisphere. Which direction does the centripetal force point? a) Towards the outside of the high pressure system b) Towards the center of the high pressure system c) Tangent to the high pressure system d) None of the above - Answers B The _____ air mass forms over the North Pole. a) cA b) mP c) cP d) mT - Answers A Two air columns extend from sea level up to an altitude of 10 km. If one column is cold and the other is warm, the air pressure in the cold column will _____ the air pressure in the warm column. a) decrease more rapidly with increasing height than b) decrease less rapidly with increasing height than c) increase more rapidly with increasing height than d) increase at the same rate as - Answers A True/False: A region of low pressure is associated with convergence and a region of high pressure is associated with divergence. a) True b) False - Answers A The pressure gradient force (PGF) is directed from areas of _____ pressure to areas of _____ pressure. a) low; high b) high; low c) The PGF is not related to high and low pressure areas. - Answers B The majority of the United States lies within a(n) ____ wind belt. a) westerly b) easterly c) northerly d) southerly - Answers A The figure above shows a wind barb. What is the wind speed shown? a) 12 knots b) 24 knots c) 25 knots d) 50 knots - Answers C Describe the pressure system in the figure above. a) This is an upper level high pressure system in the Southern Hemisphere. b) This is a surface high pressure system in the Southern Hemisphere. c) This is an upper level low pressure system in the Northern Hemisphere. d) This is a surface low pressure system in the Northern Hemisphere. - Answers B True/False: The atmosphere is more stable when valley breezes occur than when mountain breezes occur. a) True b) False - Answers B The intertropical convergence zone (ITCZ) is a region where the _____. a) polar front meets the subtropical high b) northeast trade winds meet the southeast trade winds c) northeast trade winds converge with the subtropical high d) polar easterlies converge with the air at the doldrums - Answers B Winds around a high pressure system in the Southern Hemisphere travel _____. a) clockwise b) counterclockwise - Answers B Which of the following associations is most accurate? a) microscale - monsoon wind b) macroscale - valley breeze c) mesoscale - sea breeze d) macroscale - turbulent eddies - Answers C Atmospheric pressure changes _____. a) more rapidly in the horizontal direction than in the vertical b) more rapidly in the vertical direction than in the horizontal c) at the same rate in the horizontal and vertical directions - Answers B True/False: Wind is named for the direction it is traveling from. a) True b) False - Answers A True/False: The Coriolis force only exists if an object is in motion. a) True b) False - Answers A The pressure gradient force (PGF) is directed from higher pressure toward lower pressure ____. a) only in the Northern Hemisphere b) everywhere on Earth except for the equator c) only in the Southern Hemisphere d) everywhere on Earth - Answers D Assume the air parcel above is in geostrophic balance in the Northern Hemisphere. The pressure gradient force (PGF) is pointing to the north. What is the resulting wind direction? a) Northerly b) Easterly c) Southerly d) Westerly - Answers D A/an _____ is used to measure wind speed and wind direction. a) barometer b) aerovane c) thermometer d) pluviometer - Answers B True/False: Land and sea breezes are examples of thermal circulations. a) True b) False - Answers A True/False: Monsoons have a seasonal cycle and land/sea breezes have a daily cycle. a) True b) False - Answers A True/False: Geopotential heights on an upper level weather map are generally higher at the equator and lower at the poles. a) True b) False - Answers A Generally, the greatest "Lake Effect" snowfall in the Great Lakes region occurs on the _____ shores. a) northern b) southern c) eastern d) western - Answers C What are the characteristics of the continental polar (cP) and continental arctic (cA) air masses? a) warm, moist, unstable b) cold, dry, stable c) cold, moist, unstable d) hot, dry, unstable - Answers B Which of the following combinations produces the weakest Coriolis force? a) slow winds and low latitudes b) slow winds and high latitudes c) fast winds and low latitudes d) fast winds and high latitudes - Answers A A parcel of air is headed westward at 30°S over Australia. Which way will the parcel be deflected due to the Coriolis force? a) To the north b) To the east c) To the south d) To the west - Answers C Which of the following forces does not have a direct effect on horizontal wind motions? a) pressure gradient force b) frictional force c) gravitational force d) Coriolis force - Answers C Mountain breezes occur during the _____ and valley breezes occur during the _____. a) night; day b) day; day c) day; night d) night; night - Answers A Anticyclonic flow is _____ in the Northern Hemisphere and _____ in the Southern Hemisphere. a) counterclockwise; clockwise b) clockwise; clockwise c) counterclockwise; counterclockwise d) clockwise; counterclockwise - Answers D A _____ is a warm, dry downslope wind that occurs on the lee-side of a mountain range and is associated with adiabatic heating. a) haboob b) chinook wind c) katabatic wind d) monsoon - Answers B On the eastern side of the Rocky Mountains, chinook winds are enhanced when _____. a) clouds form and precipitation falls on the western side of the mountains b) the air aloft is cold c) the sun is shining d) the winds are blowing from the east - Answers A The figure above shows a wind barb. What is the wind direction shown? a) Northwesterly b) Southwesterly c) Northeasterly d) Southeasterly - Answers C What two atmospheric properties describe an air mass? a) Temperature and pressure b) Pressure and moisture c) Temperature and moisture - Answers C True/False: A low pressure system is called an anticyclone and a high pressure system is called a cyclone. a) True b) False - Answers B Jet streams play a major role in the global transfer of heat by directing _____. a) cold air to the poles b) cold air equatorward c) warm air equatorward d) warm air to the tropics - Answers B A ridge on an upper level weather chart in the Northern Hemisphere indicates _____. a) higher-than-average geopotential heights b) lower-than-average geopotential heights c) average geopotential heights - Answers A The figure above shows a 500 mb weather map. Does the location of the star indicate a high or a low pressure system? a) High b) Low c) There's not enough information to answer this question. - Answers A We can assume geostrophic balance when the _____ force is equal to and acts in the opposite direction of the _____ force. a) Coriolis; friction b) pressure gradient; friction c) pressure gradient; Coriolis d) gravitational; Coriolis - Answers C The figure above shows a 500 mb weather map. In this figure, the heavy black line represents _____. a) an upper level ridge and a region of low pressure b) an upper level trough and a region of low pressure c) an upper level trough and a region of high pressure d) an upper level ridge and a region of high pressure - Answers B True/False: A column of cold air is associated with high pressure aloft and a column of warm air is associated with low pressure aloft. a) True b) False - Answers B We can assume gradient wind balance when _____. a) you take friction into account and the geopotential height contours are curved b) you take friction into account and the geopotential height contours are straight c) friction is ignored and the geopotential height contours are curved d) friction is ignored and the geopotential height contours are straight - Answers C The figure above shows a 500 mb weather map. What is the wind direction of the geostrophic wind at the location of the star? a) Northeasterly b) Southeasterly c) Northwesterly d) Southwesterly - Answers D When the upward-directed pressure gradient force (PGF) is in balance with the downward pull of gravity, the atmosphere is in ____. a) hydrostatic balance b) unstable balance c) geostrophic balance d) isobaric balance - Answers A According to the three cell model, deserts are located in areas of sinking motion around _____. a) the equator and 60 degrees b) 30 degrees and the poles c) the equator and the poles d) 30 degrees and 60 degrees - Answers B A _____ is a type of dust storm that forms along the leading edge of a thunderstorm and can extend horizontally for over a hundred kilometers. a) katabatic b) foehn c) hurricane d) haboob - Answers D Using the three cell model, the surface winds are_____ between the equator and 30 deg. a) northwesterly in the Northern Hemisphere and southwesterly in the Southern Hemisphere b) southerly in the Northern Hemisphere and northerly in the Southern Hemisphere c) northeasterly in the Northern Hemisphere and southeasterly in the Southern Hemisphere d) northerly in the Northern Hemisphere and southerly in the Southern Hemisphere - Answers C Geopotential height contours with lower heights are associated with _____ air columns, and geopotential height contours with higher heights are associated with _____ air columns. a) warm; cold b) cold; warm c) Geopotential height contours are not related to temperature. - Answers B The Coriolis force deflects objects to the _____ in the Northern Hemisphere and to the _____ in the Southern Hemisphere. a) left; left b) left; right c) right; left d) right; right - Answers C While fly fishing in a mountain stream, you notice that the wind is blowing uphill. From this you might deduce that the wind is a _____. a) chinook wind b) valley breeze c) Santa Ana wind d) mountain breeze - Answers B Upper level winds that flow parallel to straight geopotential height contours are in _____. a) hydrostatic balance b) geostrophic balance c) gradient wind balance d) equilibrium balance - Answers B What types of clouds are usually associated with a thunderstorm? a) Stratus and Altostratus b) Cirrus and Cirrocumulus c) Cumulus and Cumulonimbus - Answers C What type of satellite images are obtained by detecting the radiation emitted by objects? a) Visible images b) Water vapor images c) Infrared images - Answers C If a mid-latitude cyclonic storm has moved from the southwest toward the northeast during the past six hours, the storm is likely to move toward the ____ during the next six hours. a) northwest b) southwest c) southeast d) northeast - Answers D The air pressure normally ____ before a cold front passes and ____ after the front passes. a) drops; drops b) drops; rises c) rises; rises d) rises; drops - Answers B Generally, the average speed of a warm front ____ the average speed of a cold front. a) is about the same as b) is slower than c) is faster than d) varies compared to - Answers B What direction does a mid-latitude cyclone rotate in the Northern Hemisphere? a) Clockwise b) Counter-clockwise - Answers B A narrow band of heavy precipitation and possibly thunderstorms is associated with a _____. a) cold front b) warm front c) stationary front - Answers A The _____ is an agency of the United Nations that is responsible for the international exchange of data. It standardizes the procedures used by 185 nations and territories to collect the observations. a) National Weather Service b) National Center for Environmental Prediction c) World Meteorological Organization d) Weather Forecast Office - Answers C True/False: The measurements from a radiosonde are used to produce a sounding. a) True b) False - Answers A List the three types of thunderstorms in order from weakest to strongest: a) Ordinary Cell (Air-Mass); Supercell; Severe b) Supercell; Ordinary Cell (Air-Mass); Severe c) Severe; Ordinary Cell (Air-Mass); Supercell d) Ordinary Cell (Air-Mass); Severe; Supercell - Answers D In a cloud, which process causes large quantities of latent heat to be released, causing the air inside the cloud to continue to rise? a) Evaporation b) Melting c) Sublimation d) Condensation - Answers D What type of instrument measures atmospheric conditions directly over water? a) Radiosonde b) Barometer c) Data buoy d) Meteogram - Answers C Using the meteogram above, what type of front moves through Jackson, Mississippi, and at what time? Note: all of the typical characteristics of a typical front may not be present. a) Warm front; 13:00 b) Warm front; 03:00 c) Cold front; 17:00 d) Cold front; 01:00 - Answers C The stages of a developing wave cyclone (in order of occurrence) are ____. a) open wave, frontal wave, mature, advanced occlusion, dissipation, stationary front b) stationary front, frontal wave, open wave, mature, advanced occlusion, dissipation c) stationary front, open wave, frontal wave, advanced occlusion, mature, dissipation d) stationary front, frontal wave, dissipation, open wave, advanced occlusion, mature - Answers B What would happen to a surface high pressure system if it were located to the west of an upper-level trough? a) The surface pressure would increase and the system would weaken. b) The surface pressure would increase and the system would strengthen. c) The surface pressure would decrease and the system would weaken. d) The surface pressure would decrease and the system would strengthen. - Answers B Upper-level divergence is located to the _____ of an upper-level trough. a) east b) west c) south d) north - Answers A A nowcast is a weather forecast that extends for ____. a) 1-2 days b) usually not more than 6 hours c) 3 days or more d) 3 to 8 days - Answers B Which of the following is characteristic of a Supercell Thunderstorm but NOT an Ordinary Cell (Air-Mass) Thunderstorm? a) The presence of wind shear b) The presence of an updraft and a downdraft c) The presence of a gust front - Answers A