EVOLUTION
THE ORIGIN OF LIFE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Clouds of carbon dioxide, hydrogen, and other gases
|
|
|
Frequent collisions with asteroids and metorites
|
|
|
Lightening strikes and volcanic eruptions
|
|
|
Closer proximity to the sun
|
Detailed explanation-1: -During the early times for Earth, the climate was extremely hot for multiple reasons. Not only was there extensive volcanic activity emitting heat, it also emitted volcanic gases of which carbon dioxide was a major component. Carbon dioxide is one of many “greenhouse gases” that we talk so much about today.
Detailed explanation-2: -The early atmosphere was primarily carbon dioxide, and photosynthetic organisms released oxygen.
Detailed explanation-3: -Earth’s temperature begins with the Sun. Roughly 30 percent of incoming sunlight is reflected back into space by bright surfaces like clouds and ice. Of the remaining 70 percent, most is absorbed by the land and ocean, and the rest is absorbed by the atmosphere. The absorbed solar energy heats our planet.
Detailed explanation-4: -The early atmosphere Its early atmosphere was probably formed from the gases given out by volcanoes. The greatest proportion of volcanic gases are made up of carbon dioxide, water vapour and ammonia. As the Earth cooled down, most of the water vapour condensed and formed the oceans.