Physical properties of Air

Hot air expands, and also rises; cooled air contracts – it s okay denser – and also sinks; and the capacity of the air to hold water relies on the temperature. A provided volume of air at 20°C (68°F) can hold twice the amount of water vapor than at 10°C (50°F). The connection of how much water a offered mass that air actually holds compared to the lot it deserve to hold is its family member humidity.

You are watching: True or false cool air can hold more moisture than warm air

When wait holds as lot water vapor as it can for a given temperature (100% relative humidity), the is said to be saturated. If saturated air is warmed, it can hold much more water (relative humidity drops), which is why heat air is supplied to dried objects--it absorbs moisture. Top top the various other hand, cooling saturated air (said come be at its dew point) pressures water out (condensation). This is why a container of a cold beverage sweats: the cools the air next to it and also moisture from the waiting condenses top top the outside of the can.

Air warmed by ocean currents picks up a lot of moisture. Together the heated wait rises, that expands, which is measured in ~ the surface ar as short air pressure. Broadening air cools, which pressures it to shed its moisture as rain or snow. Opposing is true because that sinking air. Such air compresses and also warms. In a zone of high pressure favor this, moisture is soaked up by the air from that surroundings.


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This photo represents the total precipitable water vapor for may 2009 together observed by betterworld2016.org's Atmospheric Infrared Sounder top top NASA's Aqua satellite. This photo represents the total precipitable water vapor for may 2009 together observed by the Atmospheric Infrared Sounder (AIRS) ~ above NASA's Aqua satellite. It mirrors the full amount that water vapor existing in the atmospheric column above each suggest of Earth's surface. If every the water vapor in the shaft were forced to loss as rain, the depth that the resulting puddle on the surface at that point is same to the value shown on the map. Fifty millimeters is around 2 inches.

Physical properties of Water

Water is one enormously reliable heat-sink. Solar heat soaked up by bodies of water during the day, or in the summer, is released at night, or in winter. Web page on archipelago or coasts advantage from the moderating effect of the ocean and also have "maritime" climates (like san Francisco). Sites away from the coastline lack this temperature buffering and have extreme "continental" climates (like Wichita).

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Like the heated air in a hot-air balloon, boil water expands. Solar heat absorbed at the equator reasons water to expand. Such heated water raises the typical level the the sea surface, and such changed ocean topography have the right to be measured. The warm in the water is carried to greater latitudes by s currents wherein it is released right into the atmosphere. Water chill by colder temperatures at high latitudes contracts (thus gets denser), sinks, (lowers the neighborhood topography) and also returns to the equator via the global ocean water circulation conveyor belt to finish the cycle.