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LMS Ch 23.3 DR
Precipitation Directed Reading
Question | Answer |
---|---|
The diameter of most cloud droplets is about?? | 20 micrometers. |
What must happen in order for a cloud droplet to fall as precipitation?? | It must increase in size. |
What two processes cause cloud droplets to fall to Earth?? | Coalescence and Supercooling. |
What happens in the process of coalescence?? | Small droplets combine to form larger droplets. |
During supercooling, a substance becomes extremely cold and?? | Does not change its state. |
What is NOT true of freezing nuclei?? | They are a form of precipitation. |
Why don’t supercooled water droplets freeze?? | There are not enough freezing nuclei available. |
Which of the following are created by the process of supercooling?? | Snow and Rain. |
The process in which freezing or condensation nuclei are introduced into a cloud to cause rain is called?? | Cloud Seeding. |
Which of the following are introduced into a cloud to cause rain because they resemble ice crystals?? | Silver Iodide Crystals. |
The substance used in cloud seeding to cool cloud droplets and cause ice crystals to form is?? | Powdered Dry Ice. |
Rain?? | Liquid precipitation. |
Drizzle?? | Rain consisting of drops smaller than 0.5 mm in diameter. |
Snow?? | Precipitation consisting of ice particles. |
Sleet?? | Clear ice pellets formed when rain falls through a layer of freezing air. |
Glaze Ice?? | A thick layer of ice on a surface. |
Ice Storm?? | The condition which produces glaze ice. |
Hail?? | Solid Precipitation in the form of lumps of ice. |