The sphere of life unfolds… Research done by: Sharlotte Mkansi Source: Internet .
-
Upload
mervyn-skinner -
Category
Documents
-
view
214 -
download
2
Transcript of The sphere of life unfolds… Research done by: Sharlotte Mkansi Source: Internet .
The sphere of life unfolds…
Research done by: Sharlotte MkansiSource: Internet
http://www.dailygalaxy.com/photos/uncategorized/2008/09/02/atmosphere.jpghttp://www.visionlearning.com/library/module_viewer.php?mid=107
http://www.rcn27.dial.pipex.com/cloudsrus/atmosphere.html
The importance of the atmosphere• This is where the weather processes take place and our world climate is
controlled by the atmosphere.– Water vapour can only rise up to the end of the troposphere(layer in
the atmosphere), clouds can form and most likely we can have rain. • The atmosphere contains the ozone layer in the stratosphere(layer of the
atmosphere), which protects us from the dangerous Ultraviolet rays.• The atmosphere contains the mesosphere(layer in the atmosphere),which
burns meteors as they enter the earth and scatters them around. Meteors can be threatening to life on earth because they are very hot.
• Most importantly, the atmosphere contains the air we breathe. This “air” is all the gases that allow life to take place.
The thickness of the atmosphere• The atmosphere in general is
thick. It extends from the earth and up to the vacuum of the universe.– Troposphere: ± 17 Km– Stratosphere: ± 50 Km– Mesosphere : ± 80 Km– Thermosphere : ± 1280 Km– Ionosphere and Exosphere extend to
the vacuum of the universe.
• Every layer of the atmosphere has its own important purpose to serve. They protect life on earth in many ways unimaginable.
Layers of the atmosphere
Vacuum of the universe
Beginning of the Exosphere and Ionosphere
Thermosphere
Mesosphere
Stratosphere
Troposphere
Breathtaking views of the atmosphere
•Aurora is the beautiful natural phenomenon that has enchanted mankind with mysterious movements, surreal shapes, and vivid colors dancing across the night sky. People travel for thousands of kilometers to see the spectacular aurora light shows in the Earth’s atmosphere. The breathtaking color displays of the Aurora Borealis, also called the Northern Lights, as well as Aurora Australis, also known as the Southern Lights, appear on clear, cold nights in the arctic sky during periods of solar activity.
•The shooting stars that we see at night occur in the mesosphere, which is 75 km to 100 km thick. They are called meteors in science and they enter the mesosphere while their high speed plunge towards the bottom of the atmosphere then they ignite. In most cases, they disintegrate and never reach altitudes(heights) lower than 30 km above sea level.
Composition of the atmosphere
Nitrogen Oxygen Argon
• All of these gases are found within the troposphere of the atmosphere because all the other layers ,except the stratosphere, do not contain any gases.
• Many people may think that oxygen is the most dominant gas in the atmosphere but it is not. The most dominant gas is Nitrogen and it is found in a large of about 78.08%.All the other gases constant in the atmosphere are:– Oxygen (O):20.95%– Argon (Ar ):0.93%