Is the Earth the only planet to sustain life?
Life on Earth Earth is the only planet in the universe known to possess life. The planet boasts several million described species, living in habitats ranging from the bottom of the deepest ocean to a few miles up into the atmosphere.
What is the only planet with plant and animal life?
There is certainly a planet that can sustain human, plant, and animal life (note: humans are animals too). It is the Earth.
Why is life possible only on the planet Earth?
Life exists only on earth because of the following reasons: Earth is at an adequate distance from the sun which gives us heat that is neither too hot nor too cold. Earth has enough amount of water, food and air for survival of living organisms. Earth has a protective ozone layer which protect us from the harmful rays.
Why do other planets Cannot sustain?
Low-mass planets are poor candidates for life for two reasons. First, their lesser gravity makes atmosphere retention difficult. Constituent molecules are more likely to reach escape velocity and be lost to space when buffeted by solar wind or stirred by collision.
What planet can support animal life?
Understanding planetary habitability is partly an extrapolation of the conditions on Earth, as this is the only planet known to support life.
Why the Earth is called Blue planet ‘? * 1 point?
Earth is called the blue planet because 71\% of earth is covered with water which makes earth appear blue from the space. Oceans covers the earth mostly. Out of this much water only 0.02 of water is suitable for drinking.
Why do we believe that life is possible only on planets where oxygen is present?
The Earth’s atmosphere contains oxygen because plants continuously produce it through photosynthesis. This abundant supply of oxygen allows life forms like animals to flourish. Therefore, oxygen had been thought to be an essential biomarker for life on extrasolar planets.
Why is life not possible on all plants?
life could not exist on without trees because they produce most of oxygen that humans and wildlife breathe. Trees absorb co2 from the atmosphere and release o2 using the process of photosynthesis.
Why is Earth different from other planets?
Perhaps the most strikingly unique feature of Earth is its vast oceans, which cover 70\% of the planet’s surface. Earth is the only world in our solar system with liquid water at its surface today. Scientists believe that Mars and Venus may have long ago had oceans, but these are long gone.
Who named planet Earth?
All of the planets, except for Earth, were named after Greek and Roman gods and godesses. The name Earth is an English/German name which simply means the ground. It comes from the Old English words ‘eor(th)e’ and ‘ertha’. In German it is ‘erde’.
What is Earth for kids?
Earth is one of the eight planets that orbit, or travel around, the Sun in the solar system. Earth is the only planet in the solar system that can support life. Life is possible on Earth because the planet has water on its surface and oxygen gas in its air. Earth also has the perfect range of temperatures for life.