Weather Instruments and Their Measurements

The video tutorial introduces six common weather instruments used in meteorology: thermometers for measuring air temperature, sling psychrometers for gauging humidity, barometers for air pressure, rain gauges for precipitation, wind vanes for wind direction, and anemometers for wind speed. Each instrument's function and measurement units are explained, providing a comprehensive overview of tools used to record meteorological data.

What principle does a thermometer use to measure temperature?

• Expansion of gases

• Expansion of liquids

• Contraction of liquids

• Contraction of solids

Which unit is not used by thermometers to measure temperature?

• Kelvin

• Degrees Fahrenheit

• Millibars

• Degrees Celsius

What does a sling psychrometer measure?

• Wind speed

• Precipitation

• Air pressure

• Relative humidity

How does the wet bulb thermometer in a sling psychrometer work?

• It absorbs heat from the air

• It heats up due to friction

• It cools down due to evaporation

• It remains at a constant temperature

What does a barometer measure?

• Humidity

• Air pressure

• Wind direction

• Temperature

Why is air pressure important in weather forecasting?

• It determines the wind speed

• It measures humidity levels

• It affects temperature readings

• It influences wet or dry conditions

What does a rain gauge measure?

• Humidity

• Wind speed

• Air pressure

• Precipitation

In what units is precipitation measured by a rain gauge?

• Millibars

• Degrees

• Knots

• Inches or centimeters

What does a wind vane indicate?

• Wind speed

• Wind direction

• Humidity

• Air pressure

How is wind speed measured by an anemometer?

• Degrees Celsius

• Millibars

• Miles per hour or knots

• Inches or centimeters