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Science Unit 1 Lesson 2- The Water Cycle
Terms in this set (22)
What is the water cycle?
Movement of water between the atmosphere, land oceans, and even living things
How does water change state?
As energy is is absorbed or released
Absorption of energy happens when water...
1. melts from solid to liquid, 2. evaporates from liquid to gas, 3. sublimates from solid to gas
Release of energy happens when...
1.water condenses from gas to liquid, 2. when it freezes from liquid to solid, 3.deposits from gas to solid
How does water reach the atmosphere?
As water vapor in three ways
What are the three ways water vapor reaches the atmosphere?
evaporation (mostly from oceans 90%), transpiration (from plants 10%) and sublimation (dry air blowing over ice less than 1%)
when liquid water changes into water vapor
liquid water turns into water vapor inside a plant and movies into the atmosphere through the plant's stomata
when solid water turns directly into water vapor.
When can sublimation happen?
when dry air blows over ice or snow where it is very cold and pressure is low
What happens to water in the atmosphere?
water reaches the atmosphere as water vapor and mixes with gases
To leave the atmosphere, water vapor must do what first?
change into a liquid or solid
How does water vapor change into a liquid or a solid before leaving the atmosphere?
precipitation or condensation
How does water move on land and in oceans?
run off and infiltration, ice flow and ocean circulation
What is runoff?
streams, rivers and water that flow over ground. Flows downhill
What is infiltration?
when water on land seeps into the ground
What is groundwater?
under ground water
What is ice flow?
Ice that moves downhill because of gravity- some on land and sometimes into the water
What is ocean circulation?
wind moves ocean water one the ocean's surface. If the water is cold or salty it sinks making deep currents
What does the water cycle transport?
energy and matter
How does the water cycle transport energy?
when water changes states and when water moves from place to place
How does the water cycle transport matter?
when water or ice moves rock, sand, salt, or anything else