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All Words

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
water cycle   The continuous movement of Earth’s water from the oceans and freshwater sources to the atmosphere and eventually back to the oceans.  
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evaporation   The process that occurs when heat energy from the sun causes water on the surface of the Earth to change phase to water vapor.  
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transpiration   The process that occurs when plants give off water vapor that enters the atmosphere.  
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condensation   The process that occurs when water vapor in the atmosphere cools and changes back into liquid water and forms clouds.  
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precipitation   The process that occurs when water returns to the Earth in the form of rain, snow, sleet, or hail.  
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surface runoff   The process that occurs when precipitation falls on land, the soil becomes saturated and the water flows along the surface into a body of water.  
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infiltration   The process that occurs when precipitation falls on land and the water soaks into the soil.  
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permeability   Describes how well water can move through a soil material.  
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groundwater   Water located beneath the ground surface in soil pore spaces.  
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pore space   The space between particles of soil.  
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porosity   A measure of the amount of pore space in soil material.  
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aquifer   An underground layer of permeable rock or materials (gravel, sand, sandstone, or cracked limestone).  
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watershed   A land area in which surface runoff drains into a river or a system of rivers and streams.  
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air pressure   A measure of the force of air pressing down on the Earth’s surface.  
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barometer   A weather instrument used to measure air pressure.  
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relative humidity   The percentage of moisture that air holds relative to the amount of moisture it could hold.  
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air mass   A large body of air with uniform properties throughout (temperature, humidity, and pressure).  
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cold front   A weather front that forms when a cold air mass meets and pushes under a warm air mass. Violent storms are associated with this type of front and fair, cool weather usually follows.  
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warm front   A weather front that forms when a mass of warm air overtakes a cold air mass and moves over it. Rain and showers usually accompany this type of front and hot, humid weather usually follows.  
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stationary front   A weather front that forms when a warm air mass meets a cold air mass and no movement occurs. This type of front can cause weather conditions that can last for days.  
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occluded front   A weather front that forms when a cold front overtakes a warm front, pushing the warm air upwards until cold air meets cool air. Less extreme weather occurs during this type of front.  
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weather   The daily condition of the Earth’s atmosphere.  
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isotherm   A line on a weather map that connects locations with the same temperature.  
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isobar   A line on a weather map that connects locations with the same air pressure.  
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climate   The general conditions of temperature and precipitation for an area over a long period of time.  
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absorption   The process of groundwater being drawn up by plant roots.  
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