EARTH SURFACE REALMS 2And3 We can look at Earth’s surficial "layers" as being comprised of several major realms or "geospheres": the atmosphere‚ lithosphere‚ hydrosphere‚ biosphere and pedosphere. The reference to "sphere" applies because Earth is spherical‚ and hence layers around it form somewhat spherical shells at the outermost edges of the solid planet. The atmosphere‚ biosphere and lithosphere more completely encircle Earth‚ while the hydrosphere and pedosphere tend to be more discontinuous
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Surface Marking of the Lungs The apex of the lung extends upwards for one to two inches above the anterior extremity of the first rib‚ and is indicated by a curved line drawn from the upper border of the sterno-clavicular articulation to the junction of the inner and middle thirds of the clavicle‚ the highest part of the curve being from 1/2 inch to 1 1/2 inches above the clavicle. The apex of the right lung is 1/2 inch higher than that of the left. The subclavian artery lies on the cervical pleura covering
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Life on Mars and Life on Earth • Life on Earth - Right spot‚ suitable for life - Size of earth has allowed the internal heat from leaking too rapidly - Plate tectonic activity and bulkinism helps maintain and recycle carbon dioxide which helps prevent the earth from freezing - The magnetic field from the inner core maintains heat at a certain level protecting earth - Within the atmosphere‚ there exists hydrogen‚ water‚ methane and ammonia - These gases are subject to lightening and
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Evolution of the Earth The planet earth has gone through much abuse and punishment in the past. Formed approximately 4.5 billion years ago‚ the earth has undergone multiple catastrophic asteroids erasing species after species. Due to geologic evidence‚ it is estimated over 90 percent of all life that had ever lived in this planet have been extinct. No more than the past 500 million years alone‚ 50-90 percent of all organisms on earth were wiped out of the geological timeline without any warning
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The atmosphere of Earth is a layer of gases surrounding the planet Earth that is retained by Earth’s gravity. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation‚ warming the surface through heat retention (greenhouse effect)‚ and reducing temperature extremes between day and night (the diurnal temperature variation).The common name given to the atmospheric gases used in breathing and photosynthesis is air. Dry air contains roughly (by volume) 78.09% nitrogen‚ 20.95% oxygen
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Earth’s Rotation Earth ’s rotation is the rotation of the solid Earth around its own axis. The Earth rotates from the west towards the east. As viewed from the North Star or polestar Polaris‚ the Earth turns counter-clockwise. The North Pole‚ also known as the Geographic North Pole or Terrestrial North Pole‚ is the point in the Northern Hemisphere where the Earth ’s axis of rotation meets its surface. This point is distinct from the Earth ’s North Magnetic Pole. The South Pole is the other point
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Our earth is made up 78 percent of water‚ and rest of it is land. Because of this‚ there is ample number of living organisms in land as well as water. It has plains‚ plateaus‚ mountains‚ valleys‚ deserts‚ forests‚ grasslands‚ oceans‚ seas‚ rivers‚ lakes etc. As there are various kinds of regions on earth‚ every region has its own kind of wild life as well as plant life. Earth has undergone a gradual change in its environment through its years of evolution. Our earth and its diverse environment:
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Origin of Earth and Evoluation of the Environment MODULE - 1 Environment through Ages 1 ORIGIN OF EARTH AND EVOLUTION OF THE ENVIRONMENT We live on a beautiful planet called earth‚ along with a wide variety of plants‚ animals and other organisms. Our earth‚ however‚ is part of a vast universe. The universe is about 15 to 20 billion years old. The age of the earth is approximately 4 to 5 billion years‚ while human beings evolved only around 2 million years ago. In this lesson‚ you shall learn
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The structure of the earth The earth has three major parts-the land part or lithosphere‚ the water part or hydrosphere and the air part or atmostpere. The lithosphere is the surface on which you live . It is also the earth solid sphere consisting mainly of massive rocks. The massive rocks form large land masses called continent and small island groups . Different land form such as mountains‚hills‚valleys‚plateaus and plains make up the lithosphere. The hydrosphere include all water forms
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direction with height that turn storms severe. • Thunderstorms with rotating updrafts are called super cells commonly producing tornadoes. animation – audio http://www.sandi.net/cms/lib/CA01001235/Centricity/Domain/7724/animations/animations glencoe earth science/thunderstorm_stages_332.swf • Stages of thunderstorms: Cumulus stage(no rain‚ mainly updrafts) ‚ Mature stage(updrafts and downdrafts caused by rain)‚ Dissipation stage (lingering downdrafts). http://my.hrw.com/sh2/sh07_10/student/tabpages/hq7c/c24/s02/vc04/hq7c_c24s02_vc04fs
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