Moisture, or humidity , is a general term we will use to describe the amount of water vapor in the air. There are a number of ways to express the amount of humidity in the air — the most common being absolute humidity, relative humidity and mixing ratio. We will take up each of these shortly. 02.
What is a general term referring to water vapor in the air but not to liquid droplets of fog cloud or rain?
| A B | humidity a general term referring to water vapor in the air but not to liquid droplets of fog, cloud, or rain | hygrometer an instrument designed to measure relative humidity | latent heat the energy absorbed or released during a change in state |
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Which term refers to the amount of water vapor in the air quizlet?
Humidity . A measure of the amount of water vapor in the air.
Which of the following words means rainy cloud?
(“ Nimbus ” comes from the Latin word for “rain.”) Two examples are the nimbostratus or cumulonimbus clouds. Nimbostratus clouds bring continuous precipitation that can last for many hours. These low-level clouds are full of moisture.
During which process does water vapor change to the liquid state?
Condensation is the process by which water vapor in the air is changed into liquid water. ... As condensation occurs and liquid water forms from the vapor, the water molecules become more organized and heat is released into the atmosphere as a result.
What happens when air absorbs more water vapor?
When air holds as much water vapor as it can for a given temperature (100% relative humidity), it is said to be saturated . If saturated air is warmed, it can hold more water (relative humidity drops), which is why warm air is used to dry objects–it absorbs moisture. ... Such air compresses and warms.
What does a relative humidity of 75 mean?
For example, a relative humidity 75 % means the air is holding 75 percent of the maximum amount of water vapour it could hold at that temperature . For example, a relative humidity 75 % means the air is holding 75 percent of the maximum amount of water vapour it could hold at that temperature.
Are made up tiny water droplets or ice crystals?
Clouds consist of millions of tiny water droplets or ice crystals. Water is found in the air as an invisible gas called water vapor. This vapor is formed when the sun heats water in lakes, rivers, and oceans.
Where does the water in raindrops come from?
Water vapor in the atmosphere cools and condenses on a particle , such a dirt, dust or soot. This creates a cloud and when the cloud becomes saturated (full of moistures), water is released as raindrops.
Why is it possible for no rain to be falling from a cloud?
Most of the condensed water in clouds does not fall as precipitation because their fall speed is not large enough to overcome updrafts which support the clouds . For precipitation to happen, first tiny water droplets must condense on even tinier dust, salt, or smoke particles, which act as a nucleus.
What are 3 major types of clouds?
While clouds appear in infinite shapes and sizes they fall into some basic forms. From his Essay of the Modifications of Clouds (1803) Luke Howard divided clouds into three categories; cirrus, cumulus and stratus . The Latin word ‘cirro’ means curl of hair.
What is the biggest type of cloud?
Cirrus clouds are the highest of all clouds and are composed entirely of ice crystals. Cirrus clouds are precipitating clouds, although the ice crystals evaporate high above the earth’s surface.
What are the 4 main cloud?
The different types of clouds are cumulus, cirrus, stratus and nimbus .
What is it called when a gas turns into a liquid?
Condensation – gas to liquid. If a gas is cooled, its particles will eventually stop moving about so fast and form a liquid. This is called condensation and occurs at the same temperature as boiling.
What are the particles doing if a liquid is evaporating?
Evaporation happens when a liquid substance becomes a gas . When water is heated, it evaporates. The molecules move and vibrate so quickly that they escape into the atmosphere as molecules of water vapor. ... Once water evaporates, it also helps form clouds.
Why does water vapor decrease with altitude?
Altitude and height play an important role in vaporization of the water as water vapours are heavy and at higher altitude, the air density decreases . Thus, it becomes difficult for heavier particles that make water vapours to get vaporized. Hence, the rate of water vaporization decreases with increase in altitude.
