2. THE WATER CYCLE
(Hydrologic Cycle)

3. TODAY’S OBJECTIVE
I can explain that solar energy (sun) is the driving force of the water cycle.
I can describe and label all stages of the water cycle (Evaporation, condensation, precipitation, transpiration, runoff, infiltration)
I can describe phase changes of H20 that may occur in each stage of the water cycle.

4. During the video, fill in the missing parts of the Water Cycle K. I
During the video, fill in the missing parts of the Water Cycle K.I.M Chart
Key Word
Information
Memory Cue
Water Cycle
Evaporation
Transpiration
Condensation
Clouds
Precipitation
Runoff/ Accumulation
Infiltration

5. THE WATER CYCLE
Water Cycle/Hydrologic Cycle: The change of water from one state to another and its movement from one place to another on Earth.
Driven by the sun’s energy

6. THE WATER CYCLE

7. THE WATER CYCLE 1 The main source of water=oceans.
Every day, trillions of liters of water evaporate from the ocean

8. THE WATER CYCLE 2
Water also evaporates rivers, lakes, and other sources on land. Plants give off water vapor as well (transpiration)

9. Turn and Teach
Why would the water cycle not exist without the sun’s energy?

10. Evaporation
Evaporation is the process by which a liquid changes into water vapor (gas) due to heating

11. Transpiration
Transpiration is the release of water vapor into the air (evaporating) from a plant’s leaves.
Water in the leaves change to water vapor (gas) due to heating.

12. Turn and Teach
Why 2 processes return water to the atmosphere?

13. THE WATER CYCLE

14. THE WATER CYCLE 3
Water vapor condenses into clouds, which are made from water droplets and dust.

15. Condensation
Condensation is the change of state from water vapor to liquid, through cooling.

16. Check for Understanding: Think, Pair, Share
Glass temperature: 2C
Air temperature: 30C
Glass temperature: 16C
Air temperature: 30C

17. Clouds
Clouds: As water vapor evaporates into the atmosphere, it will become cooler and condense into water droplets. These water droplets mix with air molecules and tiny dirt particles to become clouds.

18. THE WATER CYCLE

19. THE WATER CYCLE 4
Water from clouds fall back to earth’s surface as precipitation.

20. Precipitation
Precipitation delivers atmospheric water back to the Earth’s surface as rain, snow, sleet, or hail.
Occurs when clouds become too heavy with water droplets.

21. THE WATER CYCLE

22. THE WATER CYCLE 5
When water reaches the ground, many things happen to it:
Runoff
Accumulation
Infiltration (groundwater)
Evaporation

23. Run-off
1. Water runs down hills due to gravity over surface

24. Accumulation
2. Water collects in oceans, rivers, lakes, streams

25. Infiltration
3. Water is soaked into the soil or ground (groundwater).

26. 4. Water is evaporated back into the atmosphere

27. Turn and Teach
Why 4 things could happen to water after it has precipitated back to earth?

28. Water Cycle Picture Water cycle: LABEL the following on your notes.
Condensation (2)
Evaporation
Accumulation
Infiltration
Runoff
Precipitation
Transpiration