The atmosphere is a mixture of gases that surrounds Earth. Help with this answer, please.
The Correct Answer and Explanation is:
The atmosphere is a mixture of gases that surrounds the Earth. It is composed of several gases, primarily nitrogen (78%), oxygen (21%), and trace amounts of other gases such as argon, carbon dioxide, neon, helium, and methane. In addition to gases, the atmosphere contains water vapor, which can vary in concentration depending on location and weather conditions.
The atmosphere is divided into several layers based on temperature differences. These layers are the troposphere, stratosphere, mesosphere, thermosphere, and exosphere. The troposphere, which is closest to the Earth’s surface, contains most of the weather systems and clouds. It extends up to about 8-15 kilometers above Earth’s surface. Above this, the stratosphere contains the ozone layer, which protects life on Earth by absorbing most of the Sun’s harmful ultraviolet radiation.
One of the key functions of the atmosphere is to protect the Earth from extreme temperatures. During the day, it absorbs heat from the Sun, which helps moderate temperatures. At night, the atmosphere prevents rapid heat loss. This process, known as the greenhouse effect, is essential for maintaining the Earth’s habitable climate. However, excess greenhouse gases, such as carbon dioxide, can cause global warming, leading to significant changes in weather patterns.
Another important role of the atmosphere is to provide the necessary gases for life. Oxygen is essential for the respiration of most living organisms, while carbon dioxide is used by plants in photosynthesis. The atmosphere also helps to regulate pressure and supports various weather phenomena such as wind, storms, and precipitation.
In summary, the atmosphere is vital for sustaining life on Earth, offering protection, regulating temperatures, and providing the gases necessary for life processes.
