Water in the Atmosphere and Evaporation

1. E V A P O R A T I O N – C O N D E N S A T I O N – P R E C I P I T A T I O N
R U N - O F F – G R O U N D W A T E R
THE WATER CYCLE

2. WHERE IS THE WATER?

4. HYDROLOGIC CYCLE

5. WATER CYCLE QUIZ
A
B
C
D
E
F
G
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2
3
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7

7. What: Water that runs or flows across Earth’s surface under the
force of gravity, causing erosion.
Why: Gravity pulls water droplets to the lowest elevation, as it
travels over the ground it collects with other water droplets to form
rills, gullies, streams, and rivers. These systems of rivers wear down
rock at different rates creating different types of landscapes.
Where: Occurs on the surface as water runs over the landscape.

8. What: When water infiltrates Earth’s surface the water becomes
apart of the groundwater and can cause erosion.
Why: Water seeps into the cracks and pores in the soil and rock.
Where: Occurs in the ground

9. What: When water changes from a liquid to
a gas.
Why: The water absorbs heat energy
(typically from the sun) which weakens and
breaks the bonds that hold the water
molecules together.
Where: Occurs in warm, sunny areas on
water that is at the surface.

10. What: When water changes from a gas to a liquid.
Why: As the air rises through the atmosphere it cools, losing energy. The
saturated air shrinks in volume, squeezing the water vapor out of the air
as it clings to a solid particle.
Where: Occurs in air that is saturated with water vapor and cooled to
the dew point.

11. What: When water falls from the sky as rain,
snow, sleet, hail, and/or freezing rain.
Why: Water likes to stick to a solid particle as well
as to itself (surface tension). As the clouds grow
larger, the condensed water droplet gets heavy
and the air can no longer hold the liquid water
in the air. This causes the water to precipitate
and fall from the sky.
Where: Occurs in locations where saturated air is
uplifted, cools, and grows large enough to fall
out of the air in the atmosphere

15. PRESSURE AND TEMPERATURE

17. HOW DO YOU INCREASE THE RATE
OF EVAPORATION?
You knocked over a glass of water on
the table, you have no towel or napkins
to wipe it up. What are some ways in
which you can increase the rate of
evaporation?

18. GLOBAL PRECIPITATION

19. HOW DO YOU INCREASE THE RATE
OF EVAPORATION?

21. EVAPORATION
• Occurs when a liquid turns into a gas
(Sublimation is the process that turns a solid into a gas)
• Energy is needed for water
to evaporate.
• This causes a cooling affect
on the surface due to the
loss of heat energy as the
water evaporates.
• Evaporation is a cooling
process (Adiabatic
Cooling).

22. EVAPORATION
• Ways to increase the rate of evaporation?
1. Temperature – INCREASE
2. WIND – INCREASE
3. SURFACE AREA – INCREASE
4. AIR PRESSURE – DECREASE
5. HUMIDITY - DECREASE