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As ______ increases, air pressure decreases. a. Pollution b. Radiation c. Water Vapor d. Altitude A maritime tropical air mass contains a. Cold, moist air b. Cold, dry air c. Warm, moist air d. Warm, dry air The forward edge of a warm air mass is a ____. a. Tropical front b. Stationary front c. Warm front d. Cold front The weather in the eye of a hurricane is a. Calm b. Windy c. Rainy d. Cool The protective ozone layer is found in the a. Thermosphere b. Mesosphere c. Troposphere d. Stratosphere Heat moves through solids by a. Convection b. Conduction c. Absorption d. Radiation Water that collects in spaces between rock and soil particles is a. Salt water b. Saturated c. Groundwater d. Hard water What is the most abundant gas in the air that we breathe? a. Oxygen b. Nitrogen c. Hydrogen d. Carbon dioxide The uppermost atmospheric layer is the a. Troposphere b. Stratosphere c. Mesosphere d. Thermosphere Most of the heat from equatorial regions is moved toward the poles by a. Convection b. Radiation c. Conduction d. Precipitation Regions of cold, heavy air are called a. Lows b. Highs c. Winds d. Jet Streams The process by which water changes from a gas to a liquid is a. Condensation b. Evaporation c. Precipitation d. The water cycle The movement of energy through empty space is a. Convection b. Conduction c. Radiation d. Absorption A warm dry air mass forms over a. Polar ocean areas b. Polar land areas c. Tropical ocean areas d. Tropical land areas Air masses that form over water are called a. Moist b. Dry c. Hot d. Cold Large thunderhead clouds that produce precipitation are called a. Nimbostratus b. Cumulonimbus c. Cumulus d. Stratus Wind occurs because air tends to move from regions of higher to lower a. Latitude b. Pressure c. Nitrogen levels d. Humidity The major source of oxygen for the Earth’s atmosphere is a. Sea water b. The sun c. Plants d. Animals At night, cool air sinks into a valley from the mountain peaks, creating a a. Valley breeze b. Mountain breeze c. Land breeze d. Jet stream The amount of water vapor in the air is called a. Capacity b. Humidity c. Saturation d. Air Pressure Weather scientists are a. Petrologists b. Hurricanologists c. Meteorologists d. Station Models Matter is anything that has mass and a. Weight b. Volume c. Pressure d. Gas A breeze that blows from the ocean toward the land is a a. Monsoon b. Land breeze c. Sea breeze d. Global wind A wind that blows from the west toward the east is a. An east wind b. A west wind c. A hurricane d. A monsoon The layer of the atmosphere closest to Earth’s surface is the a. Troposphere b. Stratosphere c. Ozone layer d. Ionosphere Unstable atmospheric conditions lead to the formation of lightning and thunder from towering a. Nimbostratus clouds b. Altocumulus clouds c. Altostratus clouds d. Cumulonimbus clouds Air has less capacity to hold water at a. 5 degrees C b. 10 degrees C c. 25 degrees C d. 50 degrees C High clouds made of ice crystals are called ______ clouds. a. Stratus b. Cumulus c. Nimbus d. Cirrus The bottom layer of the atmosphere where almost all weather occurs is a. Stratosphere b. Troposphere c. Thermosphere d. Mesosphere