What is the reason why the earth is livable?

The reason why the earth is suitable for living is that the distance between the sun and the earth is moderate, the temperature is suitable, and the atmosphere is protected. It is a rocky planet.

1, the distance between the sun and the earth is moderate.

The earth is neither too close nor too far from the sun, and receives moderate light. Plants can freely use solar energy for photosynthesis and store the energy needed for life activities. When vegetarians eat plants, this stored energy will reach vegetarians, and when carnivores eat vegetarians, the energy will reach carnivores ... in this way, it is the light of the sun that can start the life machines of animals and plants on the earth and make their descendants flourish.

2. Comfortable temperature

Suitable temperature on the earth is necessary for life activities. The energy needed for life activities is provided by metabolism. Too cold or too hot environment is not conducive to normal metabolism. Only at a suitable temperature can plants carry out photosynthesis effectively.

The earth has an atmosphere.

The earth is protected by the atmosphere, which is by no means dispensable for the life living in it, because it blocks the strong ultraviolet rays from space, so that life on earth is not harmed; The atmosphere blocks most meteorites that hit the earth, and the surface of the earth is not as uneven as that of the moon.

The earth is a rocky planet.

The core is molten magma, and its main component is iron. When the earth rotates, the iron core produces a strong magnetic field. This magnetic field surrounds the earth and protects it. When a solar storm, that is, a high-speed charged particle stream from the sun violently hits the earth, the magnetic field around the earth blocks it in space, thus protecting life on the earth.

Extended data

Virtue scientists claim to have discovered 24 planets that are more livable than the earth.

According to CCTV, recently, American and German researchers announced that 24 "super livable" planets were finally selected from 4,500 known extraterrestrial planets after comparing their age, mass, volume, surface temperature, presence of water and distance from stars.

These planets are all more than 100 light-years away from the earth. The stars they surround live longer and change more slowly than the sun, so life may grow more easily on these planets.

These livable planets usually refer to the right orbital region around their stars, and the temperature is moderate enough to allow liquid water to exist on their surfaces without freezing or boiling.

Baidu Encyclopedia-Earth (one of the eight planets in the solar system)