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Questions and Answers
What is the primary purpose of a weather vane?
What is the primary purpose of a weather vane?
- To determine wind direction (correct)
- To indicate atmospheric pressure
- To measure wind speed
- To predict weather conditions
The Beaufort scale ranges from 0 to 12, with 0 indicating a hurricane.
The Beaufort scale ranges from 0 to 12, with 0 indicating a hurricane.
False (B)
What instrument is used to measure wind speed?
What instrument is used to measure wind speed?
anemometer
The _____ winds are those that always blow in the same direction.
The _____ winds are those that always blow in the same direction.
Match the following wind types with their descriptions:
Match the following wind types with their descriptions:
Flashcards
Wind direction
Wind direction
The direction from which the wind blows, as indicated by a weather vane or flag.
Prevailing winds
Prevailing winds
Winds that consistently blow in the same direction.
Beaufort scale
Beaufort scale
A scale used to measure wind speed, ranging from 0 (calm) to 12 (hurricane).
Wind speed
Wind speed
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Anemometer
Anemometer
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Study Notes
Wind Direction and Strength
- Wind is described by its strength (or speed) and direction.
- Wind direction is observed using a weather vane on buildings or flags on flagpoles.
- Wind is named according to the compass direction it originates from (e.g., a north wind blows from the north).
- A wind sock also indicates wind direction.
Prevailing Winds
- Prevailing winds consistently blow in the same direction.
- Prevailing winds are associated with areas of high and low air pressure.
- The equator has low air pressure.
- The three main belts of prevailing winds are the trade winds, westerlies, and polar easterlies.
- Trade winds are named after sailing ships.
Beaufort Scale
- The Beaufort scale measures wind speed.
- It was developed by Admiral Sir Francis Beaufort in 1805.
- The scale ranges from 0 (dead calm) to 12 (and above, hurricane).
- Wind speeds are listed in km/h.
Measuring Wind Speed
- An instrument called an anemometer measures wind speed.
- An anemometer includes four cups that spin with the wind.
- The spinning speed is measured and indicated electronically.
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