Weather Instruments, Cyclones, and 12/13

What weather instrument measures air pressure? 

• Hygrometer
• Barometer
• Rain Gauge
• Wind Vane

What does this tool measure?

• Wind speed
• Wind direction
• Air pressure
• Temperature

This weather instrument is an...

• wind vane
• anemometer
• barometer
• thermometer

When a substance changes from a gas to a liquid it is called ____.

• condensation

• evaporation

• freezing

• melting

What is the dewpoint if the dry bulb temp. is 12° C and the wet bulb temp. is 11° C?

• 12°

• 10° C

• 8º C

• 6º C

What is the Relative Humidity if the dry bulb temp. is 10º C and the wet bulb temp. is 1º C?

• 100%

• 88%

• 43%

• 4%

What is the relative humidity if the dry bulb temp is 4º C and the difference between the wet and dry bulb temps is 0º C?

• 42%

• 56%

• 67%

• 100%

If the dry bulb temp. is 12º C and the dewpoint is also 12º C, what is the relative humidity?

• 88%

• 90%

• 120%

• 100%

If there is fog outside on a cool summer morning, what most likely is the relative humidity?

• 200%

• 110%

• 100%

• 50%

What is the wet-bulb if the dry-bulb is 16C and the relative humidity is 80%?

• 12

• 14

• 10

• 8