Chapter 23 Section 3 Review Page 590

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# Chapter 23 Section 3 Review Page 590 - PowerPoint PPT Presentation

Chapter 23 Section 3 Review Page 590. 1. Identify four forms of precipitation. Rain Snow Sleet Hail. Hail. Hail. http://www.strangedangers.com/content/item/10550.html. 2. Compare coalescence and supercooling. Coalescence is the combining of many small droplets into one larger drop.

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### Chapter 23 Section 3 Review Page 590

Hail

http://www.strangedangers.com/content/item/10550.html

2. Compare coalescence and supercooling.
• Coalescence is the combining of many small droplets into one larger drop.
• Supercooling is the cooling of water to below its freezing point without a change in state. Then the water encounters freezing nuclei and forms ice crystals.
Supercooling

Coalescence

• Rain Gauge
4. Describe how the amount of snowfall can be measured.
• Snow depth is determined using a measuring stick.
• Water content can be determined by melting a certain volume of snow.
Snow Depth and Water Content

My yard, January 22, 2008

5. Explain how Doppler radar can be used to measure the intensity of precipitation.
• Doppler radar works by bouncing radio waves off of snow or rain. Measuring the return waves tells us about the intensity of the rain or snow.
• Precipitation can be stimulated artificially be adding condensation nuclei in the form of dry ice or chemical crystals into a cloud.