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SCI-7 U6

All Words

QuestionAnswer
water cycle The continuous movement of Earth’s water from the oceans and freshwater sources to the atmosphere and eventually back to the oceans.
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.
transpiration The process that occurs when plants give off water vapor that enters the atmosphere.
condensation The process that occurs when water vapor in the atmosphere cools and changes back into liquid water and forms clouds.
precipitation The process that occurs when water returns to the Earth in the form of rain, snow, sleet, or hail.
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.
infiltration The process that occurs when precipitation falls on land and the water soaks into the soil.
permeability Describes how well water can move through a soil material.
groundwater Water located beneath the ground surface in soil pore spaces.
pore space The space between particles of soil.
porosity A measure of the amount of pore space in soil material.
aquifer An underground layer of permeable rock or materials (gravel, sand, sandstone, or cracked limestone).
watershed A land area in which surface runoff drains into a river or a system of rivers and streams.
air pressure A measure of the force of air pressing down on the Earth’s surface.
barometer A weather instrument used to measure air pressure.
relative humidity The percentage of moisture that air holds relative to the amount of moisture it could hold.
air mass A large body of air with uniform properties throughout (temperature, humidity, and pressure).
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.
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.
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.
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.
weather The daily condition of the Earth’s atmosphere.
isotherm A line on a weather map that connects locations with the same temperature.
isobar A line on a weather map that connects locations with the same air pressure.
climate The general conditions of temperature and precipitation for an area over a long period of time.
absorption The process of groundwater being drawn up by plant roots.
Created by: susanmason