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Ch7 Scott Foresman
4th Grade Science
| Question | Answer |
|---|---|
| hurricane | a dangerous storm made up of swirling bands of thunderstorms with speeds at least 117 km/hr |
| Tropical depression | a low pressure air mass that froms over warm water and has swirling winds that can be as strong as 61 km/hr |
| Tropical storm | a low pressure air mass that forms over warm water and has swirling winds that are more than 61km/hr but less than 119 km/hr |
| Storm Surge | water pushed ahead onto shore by a the winds outside the eye wall of a hurricane |
| What is the source of a hurricane's energy | The transfer of the heat from the warm ocean water into the air |
| How does a hurrican cause damage | Strong winds; flooding; mudlides; storm surges & strong waves |
| What types of information can hurricane model give? | Strength, direction, and speed |
| Tornado | a rapidly spinning column of air that comes down out of a thunderstorm cloud and touches the ground |
| Vortex | a spinning funnel-shaped are in a fluid |
| Caracteristics of a tornado | Forms over land; hundreds of METERS across; lasts only a few minutes |
| Characteristics of a hurricane | forms over water; hundreds of KILOMETERS across; can last for days |
| tornado watch | tornados are likely to form within a few hours |
| tornado warning | a tornado has been detected on radar |
| dust devil | column of whirling air - NOT A TORNADO - not part of a thunderstorm Common where columns of hot air rise |
| waterspout | a rapidly spinning column of air over a lade or ocean. Usually weaker than tornados |
Created by:
czeponis
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