Environmental Science
The main reason why vegetables take longer to cook in boiling water at high altitudes is because:

The temperature of the boiling water decreases with increasing altitude
Saturation vapor pressure decreases with increasing altitude
There is less oxygen in the air at high altitude
Water boils at a higher temperature with higher altitude

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

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

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