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Transcript
The Water Cycle
By PPTA Award Winner:
Mr. Montgomery
Water never leaves the Earth. It is constantly
being cycled through the atmosphere, ocean,
and land. This process, known as the water
cycle, is driven by energy from the sun. The
water cycle is crucial to the existence of life on
our planet.
Evaporation
During the water cycle, the sun heats up liquid
water and changes it to a gas by the process
of evaporation. Water that evaporates from
Earth’s oceans, lakes, rivers, and soil rises up
into the atmosphere.
Transpiration
The process of evaporation from plants is
called transpiration. (In other words, it’s like
plants sweating.)
Condensation
As water vapor rises higher in the atmosphere, it
starts to cool and become a liquid again. This
process is called condensation. When a large
amount of water vapor condenses, it results in the
formation of clouds.
Precipitation
When the water in the clouds gets too
heavy, the water falls back to the earth.
This is called precipitation.
I condensed
way too much
water today
Infiltration
Infiltration is when water from
precipitation in absorbed into the
ground and becomes groundwater
• The rest becomes runoff
Runoff
Precipitation that isn’t infiltrated runs directly into
streams or rivers. Water that collects in rivers and
streams is called runoff.
The Sun Powers the Water Cycle