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Vocabulary 3.1

Science Vocabulary 3.1

TermDefinition
water cycle The continuous process by which water moves from Earth's surface to the atmosphere and back.
evaporation A process at which molecules at the surface of a liquid absorb enough energy to change to the gaseous state.
condensation Water vapor cools and becomes a liquid.
precipitation When water in the form of ice, rain, sleet, hail, or snow, falls to Earth.
transpiration The water that plants give off as part of their respiratory process (they "breathe" in carbon dioxide and "breathe" out oxygen - in this process, they also make water).
runoff When precipitation hits the ground, it is either absorbed, or it flows over the surface of the Earth.
water vapor Water in its gas form.
groundwater Water that is in the ground.
States of Matter The physical forms of matter, which include solid, liquid, and gas.
solid A state of matter that has a definite shape and a definite volume; when water is in this state, it is because its temperature is below the freezing point and the water molecules are close together.
liquid A state of matter that has a definite volume but no definite shape; when water is in this state, is above the freezing point and the water molecules are not quite as close together.
gas A state of matter with no definite shape or volume; when water is in this state, it is called "water vapor," and you cannot see it; the temperatures are warm; water molecules are farther apart.
hail Ice pellets larger than 5 millimeters in diameter formed in cumulonimbus clouds by strong updrafts of wind.
sleet Clear ice pellets precipitation, forms when rain falls through layer of freezing air.
snow A solid form of precipitation composed of ice crystals in complex hexagonal form.
rain Liquid precipitation.
climate graph Consists of two Y axis's and an x axis.
yearly seasons Winter, Summer, Autumn and Spring
weather The daily conditions of the atmosphere in terms of temperature, atmospheric pressure, cloud cover, wind, and moisture.
climate The weather conditions prevailing in an area in general or over a long period.
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