Question

What is altitude
What is water vapour

Answer 1

Step-by-step explanation:

What is altitude

Atmospheric pressure is directly related to the density of air. It is the highest at sea level.

What is water vapour

Air containing water vapour weighs less than the same amount of dry air. Thus, dry air is more dense and exerts more pressure than moist air.

Answer 2

Step-by-step explanation:

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• Altitude or height is a distance measurement, usually in the vertical or "up" direction, between a reference datum and a point or object. The exact definition and reference datum varies according to the context.

• Water vapor, water vapour or aqueous vapor is the gaseous phase of water. It is one state of water within the hydrosphere. Water vapor can be produced from the evaporation or boiling of liquid water or from the sublimation of ice. Water vapor is transparent, like most constituents of the atmosphere.