THE WATER CYCLE Day 1

# THE WATER CYCLE Day 1

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## THE WATER CYCLE Day 1

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1. THE WATER CYCLEDay 1 Condensation, Precipitation, and Evaporation

2. INDICATORS • Recognize and describe that the amount of water on Earth continues to stay the same even though it may change from one form to another. • Describe how water on Earth changes. • Condensation • Precipitation • Evaporation

3. What do you know? Answer True/False questions 1 – 9 to see what you already know about the water cycle.

4. The water on Earth is about 3 billion years old. There is no new water. • The amount of water on Earth changes each year as people use it. • Only heat from the Sun causes water to evaporate.

5. 4. Examples of precipitation are snow, hail, and sleet. 5. Examples of condensation are rivers, oceans, and streams. 6. Water cannot evaporate unless it is boiling.

6. 7. Today, you and I drink recycled water. 8. The condensation that forms on a cold, frosty glass comes from the air. 9. Some living things can survive without water. 10. The water cycle stops at night.

7. Let’s look at a model of the water cycle. Teacher instructions are located on this slide in “Notes View” of Powerpoint

8. LESSON REVIEW Take the TRUE/FALSE quiz again. Did you change any answers? Why?

9. The water on Earth is about 3 billion years old. There is no new water. • The amount of water on Earth changes each year as people use it. • Only heat from the Sun causes water to evaporate.

10. 4. Examples of precipitation are snow, hail, and sleet. 5. Examples of condensation are rivers, oceans, and streams. 6. Water cannot evaporate unless it is boiling.

11. 7. Today, you and I drink recycled water. 8. The condensation that forms on a cold, frosty glass comes from the air. 9. Some living things can survive without water. 10. The water cycle stops at night.

12. ACTIVITY Work with a partner or small group to draw and label your own water cycle diagram. Use ScienceSaurus page 188-189 to help you write a definition of each step.

13. THE WATER CYCLEDay 2 Condensation, Precipitation, and Evaporation

14. INDICATORS • Recognize and describe that the amount of water on Earth continues to stay the same even though it may change from one form to another. • Describe how water on Earth changes. • Condensation • Precipitation • Evaporation

15. Now that we have seen the water cycle in action, let’s take a closer look at each step.

16. EVAPORATION • The process of changing water from a liquid to a gas. • Water vapor is the name for water in gas form. • Heat from the sun causes water on the Earth’s surface to evaporate more rapidly.

17. EVAPORATION

18. EVAPORATION

19. CONDENSATION • The process of changing water from a gas to a liquid. • This happens when the air gets cooler. • Water droplets clump together to form a cloud.

20. CONDENSATION

21. PRECIPITATION • Water that falls to the Earth’s surface as: • Rain • Snow • Sleet • Hail • Precipitation occurs when the water droplets become too large and heavy for the cloud.

22. PRECIPITATION

23. PRECIPITATION

24. THE WATER CYCLE • The change of water from liquid to gas and back to liquid as it moves between the Earth’s surface and atmosphere. • The combination of evaporation, condensation, and precipitation occurring in a repeated cycle is called the WATER CYCLE. • The water cycle is always occurring.

25. THE WATER CYCLE Precipitation Condensation Water Vapor Evaporation

26. WATER CYCLE ACTIVITY Read a short poem on the Water Cycle on the following slide. After your teacher gives you a copy of the poem, circle the science words that you find. Finally, illustrate each stanza.

27. THE WATER CYCLE by W. Gregory Stewart      When the sun is shining      On the water in a pond,      And the water's getting warmer,      Then the water will respond By turning into vapor!      (First it's liquid, then it's gas.)      This is called EVAPORATION--      But you know that, don't you, class? So the water vapor rises      Up to where the air is cold,      Which causes CONDENSATION      Into all the clouds that hold...

28. ...that evaporated water. When the clouds can hold no more,      They let the water out and then      The rain begins to pour, Or snow, or sleet, or hail,      Or any combination.      And what's the name for this?      Of course--It's called PRECIPITATION. And that's the WATER CYCLE,      Just as plain as one, two, three--      Let's try the rhyme just one more time,      Come, say the names with me: Step one's EVAPORATION;      CONDENSATION'S number two;      Step three's PRECIPITATION--      When the water falls on you!

29. THEEND