What are the two things needed to support life on a planet?

Life on Earth uses only two types of energy for metabolism: sunlight and redox chemistry One or the other has to be present, and if you’re in the habitable zone of a star, you at least have enough light to support photosynthesis. So you have the right temperature, water, and sunlight. What else do you need?

What are the three things needed for life to exist on a planet?

Basic Requirements for Life Warmth to allow liquid water to exist (or liquid methane?) Energy is needed to fuel chemical reactions (metabolism) Complex Chemistry.

Do you think the Earth is the only planet that supports life explain your answer?

Earth is one special planet. Though other bodies in our solar system, such as Saturn’s moon Titan, seem like they could have once been hospitable to some form of life, and scientists still have hope of eventually digging up microbes beneath the surface of Mars, Earth is still the only world known to support life.

What do planets need to be habitable?

The standard definition for a habitable planet is one that can sustain life for a significant period of time. As far as researchers know, this requires a planet to have liquid water. To detect this water from space, it must be on the planet’s surface.

Which planet has conditions that can support life explain your answer?

Earth
Understanding planetary habitability is partly an extrapolation of the conditions on Earth, as this is the only planet known to support life.

What do you think will happen if the atmosphere on Earth is removed?

The temperature of the Earth would rapidly start to rise once our atmosphere had disappeared. Without our atmosphere we have little protection from the Sun’s heat. It would penetrate to the Earth’s surface and cause the water to start boiling off into steam that would float off into space.

What is the origin of life on other planets?

Life might have evolved on their surfaces in that time, and then either fled to safer locales on those planets, such as underground, or adapted to the environment when it became harsh, much as so-called extremophile organisms have on Earth, or both. In addition, other solvents might host life.

What are the main features of Earth?

Earth consists of land, air, water and life. The land contains mountains, valleys and flat areas. The air is made up of different gases, mainly nitrogen and oxygen. The water includes oceans, lakes, rivers, streams, rain, snow and ice. Life consists of people, animals and plants.

What would it take to make life on Earth?

“First, you’d need some kind of liquid, any place where molecules can go react,” Seager told OurAmazingPlanet. In such a soup, the ingredients for life as we know it, such as DNA and proteins, can swim around and interact with each other to carry out the reactions needed for life to happen.

How do astronomers search for life on other planets?

Astronomers looking for extraterrestrial life most often focus on planets in the so-called habitable zones of their stars — orbits that are neither too hot nor too cold for liquid water to persist on the surfaces of those worlds. Earth happened to hit the Goldilocks mark, forming within the sun’s habitable zone.