Between 0 and 4 percent of the Earth's atmosphere is made up of water vapor. The amount of water vapor present in the atmosphere, also known as humidity, is the most variable characteristic of the atmosphere and is largely dependent on air temperature.Know More
At 86 degrees Fahrenheit, a volume of air can hold up to 4 percent water vapor. At minus 40 F, air can hold no more than 0.2 percent water vapor.
Water vapor enters the atmosphere by way of evaporation from the Earth's surface. When a volume of air holds the maximum amount of water vapor possible for a given temperature, it is said to be saturated and has a relative humidity of 100 percent.Learn more in Atmosphere
Clouds come from small liquid droplets or frozen crystals of water and float in the atmosphere above the surface of Earth, or any other planet known to have a gas in the atmosphere.Full Answer >
The four main gases in the atmosphere are nitrogen, oxygen, argon and carbon dioxide. However, two of these gases make up most of the atmosphere. They are nitrogen and oxygen, which between them account for over 99 percent of the atmosphere.Full Answer >
Humans live in the layer of the atmosphere referred to as the troposphere. Most of the mass of the atmosphere can be found in the troposphere.Full Answer >
The outermost layer of the Earth's atmosphere is the exosphere, followed by the thermosphere, mesosphere, stratosphere and troposphere. The exosphere begins at the top of the thermosphere and is 6,200 miles above the Earth's surface. Below the exosphere is the thermosphere, which starts 53 miles above the surface and extends up to 375 miles high.Full Answer >