what are the physical features of the earth that make it ideal habitat to human being??pls answer.............
451443
Land.\nWater.\nOxygen.\nOther Animals which we get only w/\nPlants which we get only w/\nCarbon dioxide\n\nsimple. there are more feats. about the climate and position and blah blah blah but thats not exactly physical.
338705
The total surface are of the Earth is 510,065,284.702 km² or 51,006,528,500 hectares.  The land surface area is 148,939,063.133 km² or 14,893,906,300 hectares
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1) Widespread Terratoriality.\n2) Global Warming.\n\n#1 is like going places man wasn't supposed to go..like space, and the deep ocean, and even underground..\n#2 is very self-explainatory.\n\nNitrogen.
52893
You should try\nhttp://en.wikipedia.org/wiki/Earth thier are alot of links going off of this page so you can find what ever you want
388473
Wow! another brain-tickling question from Neuro-Prof! What imagination! Yeah, that would be pretty interesting to see. I think a planet with such conditions will be a home for people who'd be considered super-heros by us on earth. Silicon would make their skin rough and abrasive. That would be just awesome!\n\nNow, coming to your question, I think the conditions that would favour such an atmosphere should be-\n1- Extremely high pressure. Pyrolysis is one of the methods to break Si-H bonds.\n\n2- Extremely high temperature.\n\n3- Reducing Atmosphere / Abundance of Dihydrogen. As compared to our earth's oxidising atmosphere, a reducing atmosphere would contribute a lot more in breaking the Si-O bonds.\n\nGreat question, I must say.
1047977
Have you stopped beating your wife yet? The way you pose the question is not sincere -- you've already interspersed conjecture. There ARE 4 corners to the earth when you look at the REAL earth from space. They are not sharp 90% angles, but nevertheless, the earth is not perfectly spherical. Check out DrDino.com and watch 28 hours of creation facts. There are far more holes in any other explanation for earth's beginning, just check them out. There were no clouds prior to the flood, it was a canopy of water. Similar, but not the same, Saturn has an ice halo around it. Earth had a complete canopy above it which regulated it temperature perfectly. Much thicker and integral than the ozone layer today. Upon God's judgment, God caused this canopy to colapse, forever altering the tropical paradise type atmosphere which allowed all manner of life to flourish, even at the poles. Animals with fresh produce still undigested have been found at the poles, frozen. Why? So God could be glorified thousands of years later when man would examine such evidence. Chances are God used a huge deep-space frozen comet or asteroid to knock the earth slightly out of a true orbit around the sun, the collision resulting in the collapse of the canopy AND cause the earth to tilt. If it were frozen nitrogen, it would quickly freeze even the largest of animals in the area the debris hit the earth. Keep in mind, God gives answers to the humble and the contrite in spirit, not to the proud.
530607
Take a look here for the answer:\nhttp://earth.google.com/
234001
This is a tough question...\nIf you mean life as we humans know it then the number is pretty small. - For life we need air,water,warmth and gravity.\nWe need to be near a sun - have oceans and land - the correct rotational axis to promote changes in seasons and lastly, a moon to create the tides.\n\nBut if you mean life as a whole... \nThen any planet that can support it would indeed have it.\nThese are a much larger group. We have even seen existance of life on Mars (microscopic bacteria).\n\nMy belief is that there is more than one Earth like planet ou there. We may even see it someday.\nWe have believed that they would seek us out - I believe we will seek THEM out.
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Earth's Atmosphere\nThe Earth is surrounded by a blanket of air, which we call the atmosphere. It reaches over 560 kilometers (348 miles) from the surface of the Earth, so we are only able to see what occurs fairly close to the ground. Early attempts at studying the nature of the atmosphere used clues from the weather, the beautiful multi-colored sunsets and sunrises, and the twinkling of stars. With the use of sensitive instruments from space, we are able to get a better view of the functioning of our atmosphere.\n\nLife on Earth is supported by the atmosphere, solar energy, and our planet's magnetic fields. The atmosphere absorbs the energy from the Sun, recycles water and other chemicals, and works with the electrical and magnetic forces to provide a moderate climate. The atmosphere also protects us from high-energy radiation and the frigid vacuum of space.\n\nThe envelope of gas surrounding the Earth changes from the ground up. Four distinct layers have been identified using thermal characteristics (temperature changes), chemical composition, movement, and density\n\nComposition of the Atmosphere\nThe atmosphere is primarily composed of Nitrogen (N2, 78%), Oxygen (O2, 21%), and Argon (Ar, 1%). A myriad of other very influential components are also present which include the water (H2O, 0 - 7%), "greenhouse" gases or Ozone (O, 0 - 0.01%), Carbon Dioxide (CO2, 0.01-0.1%),\n\n\nLayers of atmosphere\n\nThe atmosphere is divided into five layers. It is thickest near the surface and thins out with height until it eventually merges with space. \n\n1) The troposphere is the first layer above the surface and contains half of the Earth's atmosphere. \nThe troposphere is where all weather takes place; it is the region of rising and falling packets of air. The air pressure at the top of the troposphere is only 10% of that at sea level (0.1 atmospheres). There is a thin buffer zone between the troposphere and the next layer called the tropopause\n\n2)The Stratosphere and Ozone Layer\nAbove the troposphere is the stratosphere, where air flow is mostly horizontal. The thin ozone layer in the upper stratosphere has a high concentration of ozone, a particularly reactive form of oxygen. This layer is primarily responsible for absorbing the ultraviolet radiation from the Sun. The formation of this layer is a delicate matter, since only when oxygen is produced in the atmosphere can an ozone layer form and prevent an intense flux of ultraviolet radiation from reaching the surface, where it is quite hazardous to the evolution of life. There is considerable recent concern that manmade flourocarbon compounds may be depleting the ozone layer, with dire future consequences for life on the Earth\nMany jet aircrafts fly in the stratosphere because it is very stable. \n\n3)Mesosphere\nThe mesosphere starts just above the stratosphere and extends to 85 kilometers (53 miles) high. In this region, the temperatures again fall as low as -93 degrees Celsius as you increase in altitude. The chemicals are in an excited state, as they absorb energy from the Sun. The mesopause separates the mesophere from the thermosphere.\n\nThe regions of the stratosphere and the mesosphere, along with the stratopause and mesopause, are called the middle atmosphere by scientists. This area has been closely studied on the ATLAS Spacelab mission series. Meteors or rock fragments burn up in the mesosphere.\n\n4)Thermosphere\nThe thermosphere starts just above the mesosphere and extends to 600 kilometers (372 miles) high. The temperatures go up as you increase in altitude due to the Sun's energy. Temperatures in this region can go as high as 1,727 degrees Celsius. Chemical reactions occur much faster here than on the surface of the Earth. This layer is known as the upper atmosphere.\n\nThe upper and lower layers of the thermosphere will be studied more closely during the Tethered Satellite Mission (TSS-1R).\n\n\n5) exosphere\nThe exosphere starts at the t
1043030
Most of the earth Surface is Covered with water, but that's only a small fraction of the planet itself. The Earth is made up mostly of silicate and magezeuim compunds and an iron core.
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The earth is indeed unique. Few people appreciate that were it not for our specific place in the solar system, meaning the distance of earth's orbit from the sun, we would not have a planet like the one we live on. \n\nWhen the solar system was forming different elements sorted themselves somewhat according to their mass and consolidated into the planets we know today. Because of earths unique position in the solar system we got a good mixture, but much more oxygen than some of the outer planets. The inner planets got much of the densest materials, and the outer planets got lots of light gases like hydrogen and helium. This imperfect sorting is probably one of the reasons the earth is blessed with an oxygen-nitrogen atmosphere, oceans of water, and iron-nickel core which probably contains just enough radioactive material to keep the planet from cooling too much. \n\nAll of those processes have contributed to our planets active plate tectonic system that builds mountains, forms oceanic basins, and causes continents to move and change over time. These changes in turn lead to changes in climate and wide variations of environments on the planet. \n\nThe Arctic and Antarctic regions experience cold climates and long periods of day and night due to their position on the planet relative to the sun and its supply of solar energy. As we move to lower latitudes we have wide expanses of boreal forests where plant life has adopted to the cooler temperate climate and ample rainfall that is brought from the tropical sources of evaporation. Tropical areas also experience this ample rainfall and even more warmth related to their position in relation to the sun. Variations in continental elevation like large mountain ranges create more variations in environment. Examples of this are deserts that are caused by rainfall being blocked by mountains interference with weather patterns. \n\nOcean environments are as varied as continental environments, with some of the same effects, but the other factors in the ocean being water depth and the ability of light to penetrate those depths, and ocean current patterns. Most ocean life lives in the upper parts of the ocean due to the limited energy from light available below certain depths. \n\nThis should give you some ideas, while you may not want to go into the whole formation of the solar system theory; this is a big picture way of understanding our planet and its varied environments. Good luck!
250515
dude educate your self before you make a broad statement like that. please dont be ignorant. in my opinion is it doesn't exist. because think about it we are coming out of an ice age. it makes sense doesn't it? fact: there have been ice ages. fact: there is a lot of ice in ice ages. so if you know about water then you know the same amount of it is here that was here when the earth began so literally it is dinosaurs piss. well during an ice age lots of stuff is covered in water/ice ( i know i live in Minnesota and it is known that it was fully covered with ice.). so where is all the water? in ice bergs, glaciers, etc. so it would make sense that to leave an ice age most things would melt right? so they are still melting they will finish melting and cover parts of the world, then it will slowly freeze causing an ice age. why would humans make that big of a difference? we are insignificant to the world.(everyone in the world could fit in Texas and it would only be as densely populated as NY city). so our vehicles and combustible engines couldn't have that big of an effect. but you say "what about the ozone thinning?" well i am not saying it hasn't but it was because of the CFC's(chloral floral carbons) which broke up the ozone by attaching to ozone molecules. but the CFC's are no longer around. the ozone is healing itself as it is meant too. their was no real hole only a thinning which is also bad. but now it is closing up and returning to normal. if you think that the co2 we produced cant be good well think about it it isn't that much and while the earth was cooling after being created it released tons of co2. so what people will notice in the next 1-9000 years is it will warm up but in that time it will also cool down and eventually there will be an ice age. just because the great human race is here doesn't mean that the earth will stop having ice ages as it has done by its self for billions of years. think about it. am i a genius or what i mean i just looked at what has happened in history wow who would have thought history would repeat its self
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Characteristics\nRainforests are characterized by high rainfall, with definitions setting minimum normal annual rainfall between 2,000 mm (about 78 inches or 2 meters) and 1700 mm (about 67 inches). The soil can be poor because high rainfall tends to leach out soluble nutrients.\n\nRain forests are home to two-thirds of all the living animal and plant species on the planet. It has been estimated that many hundreds of millions of new species of plants, insects, and microorganisms are still undiscovered and as yet unnamed by science. Tropical rain forests are called the "jewel of the earth", the "Earth's lungs", and the "world's largest pharmacy" because of the large amount of natural medicines discovered there.\n\nDespite the growth of flora in a rainforest, the actual quality of the soil is quite poor. Oxisols, infertile, and deeply weathered, have developed on the ancient Gondwanan shields. Rapid bacterial decay prevents the accumulation of humus. The concentration of iron and aluminium oxides by the laterization process gives the oxisols a bright red color and sometimes produces minable deposits (e.g. bauxite). On younger substrates, especially of volcanic origin, tropical soils may be quite fertile.\n\nhttp://www.answers.com/RAINFOREST
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I did some research... here are some websites that might help...\n\nThe 2nd one is a map quiz that will help you learn more about the physical features.
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The earth is round due to its rotation and gravity.  The sphere is a perfect structure.  Think about it, the bubble forms a skin and holds its shape.  Hurricanes are circular, so are whirpools, dustdevils, tornados.
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Water, you can not sustain life without it. That includes every form of life, man, animal, forests, bacteria, etc. Everything!\n\nAir, which contains oxygen on which we as human beings depend on for our dear life.\n\nSunlight, which is the beginning of our very existence. Imagine what life would be if there was no sun. \n\nThere are many other natural resources which surround us on this wonderful planet called the Earth. But I would say that these three definitely top the list.\n\nBy the way, you ask very intelligent questions. Good for you to be so concerned about your enviornment.
429942
an end...overpopulation etc...where can we live?  there are no other earths out there in space...(if we try to settle on saturn, we'll go right through the planet)  our food supply going down, energy being doomed. etc