Environmental Science
Which of the following is the best indicator of the actual amount of water vapour in the air?

Air temperature
Saturation vapour pressure
Dew point temperature
Relative humidity

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

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

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