why life possible on earth
Answers
Answer:
Earth's amazing gaseous atmosphere is responsible for making life possible on this, the third planet from the Sun. Our atmosphere contains water vapor which helps to moderate our daily temperatures. Our atmosphere contains 21% oxygen, which is necessary for us to breathe, 78% nitrogen, and .9% argon. The other 0.1% consists of water vapor, carbon dioxide, neon, methane, krypton, helium, xenon, hydrogen, nitrous oxide, carbon monoxide, nitrogen dioxide, sulfur dioxide, and ozone. These latter elements are important to have because they help to absorb harmful solar radiation before it can reach the surface of the Earth. If present in larger amounts, most of these latter elements would be poisonous to humans. The atmosphere protects us from meteors as well. Due to the friction generated between a meteor and the atmospheric gases, most meteors burn up before hitting Earth's surface as a meteorite.
The Earth from Space
The Earth from space
Image of a hurricane seen from space
A hurricane seen from space
Earth rotates on an imaginary axis which is tilted at a 23.5 degree angle. The rotation is what causes the change from day to night. The tilt is what determines our change in seasons. If the Earth was not tilted, we would have the same season all year long. Earth has a core of molten iron-nickel. The rapid spin of the Earth along with the liquid, hot metallic core causes a magnetic field to surround the Earth. This magnetic field traps the charged particles which are hurled at the Earth by the Sun during solar wind activity. When these charged particles react with the gases in our atmosphere, the gases begin to glow. These aurorae, or glowing gases, are seen in the Arctic Circle and the Antarctic Circle. As with all inner planets, Earth's surface has been affected by volcanism, tectonic activity, and to a lesser degree, meteorite impacts. Earth has one naturally occurring satellite, the Moon.
Explanation:
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Answer:
Life is only found on Earth for a couple of reasons.We know that life requires sun, moderate temperatures, water, and certain chemical elements like carbon, oxygen, and nitrogen. No other planet has temperatures like Earth that are not too hot and not too cold. Also, no other planet has water like Earth has. Scientists have found that other planets have ice but no liquid water. Finally, Earth has the right mix of chemicals that are required for life.
Explanation:
Earth's amazing gaseous atmosphere is responsible for making life possible on this, the third planet from the Sun. Our atmosphere contains water vapor which helps to moderate our daily temperatures. Our atmosphere contains 21% oxygen, which is necessary for us to breathe, 78% nitrogen, and .9% argon. The other 0.1% consists of water vapor, carbon dioxide, neon, methane, krypton, helium, xenon, hydrogen, nitrous oxide, carbon monoxide, nitrogen dioxide, sulfur dioxide, and ozone. These latter elements are important to have because they help to absorb harmful solar radiation before it can reach the surface of the Earth. If present in larger amounts, most of these latter elements would be poisonous to humans. The atmosphere protects us from meteors as well. Due to the friction generated between a meteor and the atmospheric gases, most meteors burn up before hitting Earth's surface as a meteorite.