Science (4th) Ch. 7 Lesson 2: The Water Cycle vocab/notes
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when a liquid changes slowly into a gas
evaporation
water in the form of a gas
water vapor
the process of a gas changing to a liquid
condensation
a collection of tiny water droplets or ice crystals in the atmosphere
cloud
to change from a liquid to a solid
freeze
water in the atmosphere that falls to Earth as rain, snow, hail, or sleet
precipitation
the constant water movement of water between Earth’s surface and the atmosphere
water cycle
to change state from a solid to a liquid
melt
Earth’s water has been recycled for __________ of years. millions thousands billions
billions
What is the energy source that drives the water cycle?
the sun
Water moves between ______ and the _______ during the water cycle.
Earth air
What is the process in which water vapor rises into the atmosphere?
evaporation
Water vapor is when water is in a _____ state.
gas
Put in order the steps of the water cycle: • The water evaporates and rises as water vapor. • The droplets grow heavy and fall to Earth. • The Sun’s energy heats the surface of the water. • Clouds form from droplets of liquid water. • As the water vapor rises higher, it cools and condenses.
• The Sun’s energy heats the surface of the water. • The water evaporates and rises as water vapor. • As the water vapor rises higher, it cools and condenses. • Clouds form from droplets of liquid water. • The droplets grow heavy and fall to Earth.
What is formed when water vapor cools and condenses on a surface?
dew
What are the 3 types of clouds?
• cumulus • stratus • cirrus
What type of clouds are puffy, white clouds that look like cotton balls?
cumulus clouds
What type of clouds form in layers?
stratus clouds
What type of clouds are thin, feathery and found very high in the sky?
cirrus clouds
Fog is an example of this kind of cloud.
stratus clouds
This type of cloud does not produce precipitation.
cirrus clouds