1. Also known as the Hydrologic Cycle
The Water Cycle
Also known as the Hydrologic Cycle

2. Movement and phase changes of water near Earth’s surface.
The Water Cycle
Movement and phase changes of water near Earth’s surface.
Water Cycle Animation

3. 1. What are the phases changes?
FREEZING
liquid
solid
gas
liquid

4. liquid solid gas liquid 1. What are the changes of phase? FREEZING
MELTING
gas
liquid

5. liquid solid gas liquid 1. What are the changes of phase? FREEZING
MELTING
CONDENSATION
gas
liquid

6. liquid solid gas liquid 1. What are the changes of phase? FREEZING
MELTING
CONDENSATION
gas
liquid
VAPORIZATION

7. Properties of Water (Earth Science Reference Tables : front page)
Energy gained during melting joules/gram
Energy released during freezing joules/gram
Energy gained during vaporization joules/gram
Energy released during condensation joules/gram
Density at 3.98 ° C gram/milliliter

8. FREEZING CONDENSATION DURING: LIQUID SOLID LIQUID GAS
2. ENERGY IS RELEASED (lost)
DURING:
FREEZING
Heat Released
334 J/g
2260 J/g
LIQUID
SOLID
CONDENSATION
LIQUID
GAS
from higher K.E. to lower K.E.

9. MELTING VAPORIZATION DURING: SOLID LIQUID LIQUID GAS
3. ENERGY IS ABSORBED (gained)
DURING:
Heat Absorbed
334 J/g
2260 J/g
MELTING
SOLID
LIQUID
VAPORIZATION
LIQUID
GAS
from lower K.E
To higher K.E.

10. Heating Curve of Water

11. temp 0C HEAT ENERGY ADDED VAPORIZATION 100 CONDENSATION WATER ICE
Heating Curve of Water
VAPORIZATION
CONDENSATION
100
STEAM
temp 0C
WATER
MELT
FREEZE
ICE
HEAT ENERGY ADDED
(CALORIES)

12. MELTING / FREEZING 00 C 00 C SEE EARTH SCIENCE REFERENCE TABLE:
+ 334 J/g
Energy is absorbed
00 C
Energy is released
00 C

13. VAPORIZATION/ CONDENSATION 2260 J/g 1000 C 1000 C Energy is absorbed
Energy is released
1000 C

14. Latent heat (hidden heat)
Is the potential energy that is absorbed or released when matter changes phase.
There is no change in temperature (kinetic energy) when matter changes phases, but potential energy does change.

15. Also known as the Hydrologic Cycle
The Water Cycle
Also known as the Hydrologic Cycle

16. Precipitation Stored on land as lakes or snow
Absorbed by trees or plants.
Infiltrate (sink) into the ground
Flow on the surface as runoff.
Example: Rivers
Precipitation Animation

17. Infiltration Rain can infiltrate (seep) into the ground
Called groundwater
Zone of Aeration = (above water table) pores are filled w/ air
Zone of Saturation = (below water table) pores are filled with water
Infiltration Animation
Permeability Animation

18. Runoff Rain can flow over Earth’s surface Example: rivers & streams
1/3 of water returns to the water cycle
Runoff Animation

19. Evaporation Change from liquid to gas Rate depends on:
Wind speed: greater the wind speed, more evaporation
Temperature: higher temperature, more evaporation
Humidity: lower humidity, more evaporation
Evaporation Animation
Evaporation Rate Animation

20. Transpiration Plants release water vapor (during photosynthesis)
Evaporation and transpiration is called EVAPOTRANSPIRATION.
Transpiration Animation

21. Key Points 1water cycle song 2 Water cycle-Mr Parr
A cyclic process
Recycles our water
Helps purify water
Let’s test the classes knowledge on the water cycle!
Hydrologic Cycle Quiz
Animation