Environmental Science
The ratio of the mass of water vapour in a given volume (parcel) of air to the mass of the remaining dry air describes the:

Mixing ratio
Relative humidity
Dew point
Absolute humidity

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Environmental Science
When a liquid thermometer is held in direct sunlight,

It will measure a much higher temperature than that of the air
It will measure the temperature of the sun rather than the air
It will measure a much lower temperature than that of the air
It will accurately measure the air temperature

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