Earth's atmosphere is primarily composed of nitrogen and oxygen with water vapor comprising 0.25 percent of the atmosphere by mass. It has five layers: troposphere, stratosphere, mesosphere, thermosphere and exosphere. More »

Some examples of conduction are a pot on a hot burner, a spoon in hot tea and touching a hot cup of coffee. In each of these examples, there is a transfer of heat from the hotter object to the colder one. Heat transfer o... More »

A greenhouse is an example of a microclimate. A greenhouse absorbs the heat of the sun and then releases it slowly over time. Greenhouses are used in areas where it is too cold to grow plants that require extra warmth. More »

Earth's atmosphere consists of a variety of gases, including nitrogen, oxygen, argon and carbon dioxide, along with tiny solid particles such as dust, pollen and plant particles. The atmosphere also contains a small amou... More » Science Earth Science Atmosphere

The two most abundant gases in the Earth’s atmosphere are nitrogen and oxygen. The atmosphere contains approximately 78 percent nitrogen and about 21 percent oxygen. The Earth’s atmosphere also contains lesser amounts of... More »

The Earth's atmosphere is primarily made up of nitrogen, oxygen and argon, but it includes trace gases in smaller amounts such as neon, helium, carbon dioxide, methane, nitrous oxide and ozone. The most abundant gases in... More »

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 perce... More »