Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
meteorologist What is a scientist who studies weather? sun What is the basic cause of all weather? greenhouse effect What term describes the trapping of heat by the earth s atmosphere? ground From what does the air receives most of its warmth? axis What is the imaginary line running from North Pole to South Pole around which the earth spins? equator What is the imaginary circling the earth midway between its poles? hemisphere What is one-half of the earth s surface? tilt What is the cause of the earth s different seasons? wind What is moving air created by temperature differences as the sun warms the earth? warm What temperature of air rises, expands, and is lighter? cool What temperature of air sinks, contracts, and is heavier? air pressure What is the weight of the atmosphere pushing down on the earth? cold air What type of air increases air pressure at ground level and pushes up? warm air What type of air reduces air pressure at ground level and shields the air below it from the full weight of the atmosphere? barometer What instrument does a meteorologist use to measure air pressure? 1,000 mph How fast does the earth spin on its axis? 66,600 mph How fast does the earth travel on its orbit around the sun? low pressure What type of air pressure does the warm air above the earth s equator have? high pressure What type of air pressure does the cold air above the earth s poles have? Coriolis Effect What is name given to the curling of wind by the Earth s rotation on its axis? trade winds Which wind system bends winds so that they blow from the east near the equator? polar easterlies Which wind system bends winds so that they blow from the east near the earth s poles? prevailing westerlies Which wind system is caused by collisions of warm tropical and cold polar airflows causing wind out of the west in the middle latitudes? humidity What is the amount of water vapor in the air? relative Which term means that different temperatures of air can hold different amounts of water vapor? saturated Which term means that the humidity of the air is 100 percent or holding the greatest amount of water vapor that it can hold? more Warm air will hold ___ water vapor. less Cool air will hold ___ water vapor. dew point What is the temperature at which cooling air becomes saturated? condensation What is the process by which released water vapor leaves the air and changes back into liquid water? dew What are droplets of water that form on cool surfaces when water vapor from the air condenses? frost What are tiny crystals of ice formed when water vapor freezes onto a cold object? cloud What is made out of tiny water droplets, rising air, and dust? solar heating What causes warm air to rise when the sun is shining? mountains What obstacles cause warm air to rise? front What is the boundary between two air masses that can cause warm air to rise? air mass What is a single large unit of air with uniform temperature and humidity? warm front What type of front occurs when a warm air mass flows over cold air mass and creates cloudy, rainy weather? cold front What type of front occurs when a cold air mass bulldozes a warm air mass up rapidly creating severe weather? cumulus What type of cloud is a puffy, bulgy, white heap? stratus What type of cloud is a low grayish-white flat layer bringing a light drizzle? cirrus What type of cloud is a high wispy curl? nimbus Which term indicates a cloud from which rain is falling? cumulonimbus Which puffy cloud is also called a thunderhead and is tall with a dark bottom and anvil top? cirrocumulus Which clouds are very high, small-looking puffy clouds which indicate a change in weather? cirrostratus Which clouds are very high thin sheets which indicate wet weather is approaching? altostratus Which clouds are medium-height flat sheets which allow little sunlight through? altocumulus Which clouds are medium-height groups of puffy clouds blown into rows by the wind? fog Which cloud is a stratus-like cloud which forms at ground-level? nimbostratus Which dark gray clouds covering the sky bring heavy rain for long periods? stratocumulus Which clouds are masses of puffy clouds bunched together and are often followed by heavy rain? radiation fog What type of fog forms on cold clear nights when air is cooled below its dew point by contact with the cold ground? sea fog What type of fog forms when warm air moves over cold water? steam fog What type of fog forms in cold air above hot pavement when water vapor condenses immediately after evaporating? rain What precipitation forms when an ice crystal in a cloud becomes too heavy, falls, melts, and land on earth as water? wet snow What precipitation forms when falling ice crystals melt slightly, stick, and freeze together? dry snow What precipitation forms when ice crystals fall through air that is well below freezing? sleet What precipitation forms when falling ice crystals melt into raindrops then refreeze and land on earth as tiny pieces of ice? freezing rain What precipitation forms when falling ice crystals melt into rain, but refreeze as soon as they land on cold earth? hail What precipitation forms when a small piece of ice gains layers of ice as it is tossed up in a cloud before falling to the earth? lightning What occurs when opposite electrical charges build up in very tall clouds? thunder What is caused by shock waves produced by the rapid expansion of superheated air? step leader What is the thin channel of charged air through which a lightning bold can travel? sheet What is a lightning bold that remains in the cloud and does not come into contact with the ground? squall line What is the row of thunderheads that builds up in front of advancing cold air? tornado Which type of severe weather produces the most destructive power in the smallest space? warning What news bulletin is given when a tornado is spotted? watch What news bulletin is given when conditions are right for a tornado to form?