Which Of The Following Best Describes What We Mean By A Habitable World?

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Which Of The Following Best Describes What We Mean By A Habitable World??

Which of the following best describes what we mean by a habitable world? A planet or moon that could support life if any life happened to be on it. Which of the following places is not generally considered a potential home for life in our solar system?

What do we mean by a star’s habitable zone quizlet?

A star’s habitable zone is the region around the star in which a terrestrial planet of the right size could have a surface temperature suitable for liquid *water and life.

When we analyze whether a world is a possible home to life the key thing we look for is?

Oxygen produced by life was removed from the atmosphere by oxidation reactions with surface rocks. When we analyze whether a world is a possible home to life the key thing we look for is______________. The past or present existence of water.

What do we mean by FNOW?

In the Drake equation what do we mean by fnow? The fraction of planets on which civilizations exist at the present time. You just studied 32 terms!

Why dont we expect to find life on planets orbiting high mass stars in a habitable zone?

Why don’t we expect to find life on planets orbiting high-mass stars? … The high-mass stars emit too much ultraviolet radiation. The lifetime of a high-mass star is too short. -High-mass stars live only a few million years and life probably cannot arise until a planet is at least a couple hundred million years old.

What defines the habitable zone around a star?

habitable zone the orbital region around a star in which an Earth-like planet can possess liquid water on its surface and possibly support life. Liquid water is essential to all life on Earth and so the definition of a habitable zone is based on the hypothesis that extraterrestrial life would share this requirement.

See also how is freezing rain formed

What is a star’s habitable zone?

The habitable zone is the range of distances from a star where liquid water might pool on the surface of an orbiting planet. If a planet is too close to its parent star it will be too hot and water would have evaporated. If a planet is too far from a star it is too cold and water is frozen.

Which of the following best describes the current status of evidence concerning whether life has ever existed on Mars?

Which of the following best describes the current status of the evidence concerning whether life has ever existed on Mars? Mars probably once had a habitable surface but we do not know if it had life. … Strong evidence suggests that it has a deep subsurface ocean of liquid water.

How do scientists study the history of life on Earth?

Paleontology is the study of the history of life on Earth as based on fossils. Fossils are the remains of plants animals fungi bacteria and single-celled living things that have been replaced by rock material or impressions of organisms preserved in rock. … Some fossils show how an organism lived.

What are the support systems that make the Earth habitable to humans elaborate your answer?

What makes the Earth habitable? It is the right distance from the Sun it is protected from harmful solar radiation by its magnetic field it is kept warm by an insulating atmosphere and it has the right chemical ingredients for life including water and carbon.

Which four moons of the Jovian planets show the most promise of life?

Test 3: Lessons 7 8 9. (part. 2)
Question Answer
Which four moons of the jovian planets show the most promise of life? Ganymede Titan Miranda Enceladus
When was the first confirmed exoplanet discovered? Near the end of the 20th century

What does the Drake equation allow us to do quizlet?

– Drake Equation- lays out the factors that are important in determining the number of transmitting civilizations. The more we learn the better estimate we can have. Nhp- number of habitable planets in the galaxy. Fnow- is the fraction of the civilization bearing planets that currently have a civilization.

Why is Europa considered a good candidate for the possible existence of life?

Why is Europa considered a good candidate for the possible existence of life? Strong evidence suggests that it has a deep subsurface ocean of liquid water. … We are not yet capable of detecting life on planets around other stars.

What would happen if a planet weren’t in the habitable zone?

Our seas would evaporate and our atmosphere fill with carbon dioxide sending the planet temperature into an upwards spiral known as a runaway greenhouse. If our solar system had just one Earth-sized planet this would suggest we could simply count-up similar sized planets in the habitable zones around other stars.

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Would you expect to find similar life forms on a planet orbiting a star with 10 times the Sun’s mass?

The lifetime of a star is roughly inversely proportional to its mass cubed. … So a star ten times more massive than our sun would live for just 1/1000th as long. We expect our sun to have a life in excess of 10 billion years so a superstar with ten times our sun’s mass would live just 10 million years.

How is it possible for a large moon of a Jovian size planet to support life on its surface?

– A few large moons may contain liquid water or other liquids potential candidates for life. – Smaller moons and other small bodies probably do not have any liquids present many may have had liquid water in the distant past.

What Defines a habitable planet?

The standard definition for a habitable planet is one that can sustain life for a significant period of time. … For example planets orbiting low-mass stars in the habitable zone may be tidally locked with only one hemisphere facing the star at all times.

Where is Earth in the habitable zone?

For a planet the habitable zone is the distance from a star that allows liquid water to persist on its surface – as long as that planet has a suitable atmosphere. In our solar system Earth sits comfortably inside the Sun’s habitable zone.

How do you determine a habitable zone?

The standard definition is that the habitable zone is the range of distances from a star in which liquid water could exist. To understand this we need to take a quick side trip into how one estimates temperature. because the area of a sphere of radius r is A = 4πr2 and the flux is the luminosity divided by the area.

What is a habitable zone and how is the idea useful is a planet in the habitable zone necessarily habitable explain?

The habitable zone is the belt around a star where temperatures are ideal for liquid water — an essential ingredient for life as we know it — to pool on a planet’s surface. Earth lies within the habitable zone of our star the sun.

What does the word habitability mean?

: capable of being lived in : suitable for habitation.

When looking for habitable worlds Which stars do you think we should focus on Choose all that apply?

M-dwarf stars are excellent targets for planet searches because the signal of an orbiting planet is relatively larger (and therefore easier to detect!) around small dim M dwarfs compared to Sun-like stars.

Is there evidence of life on Mars quizlet?

Although there has been much speculation to date there has never been any proof of life existing on Mars. However cumulative evidence is now building that Mars once was habitable.

Is it possible to live on planet Mars?

However the surface is not hospitable to humans or most known life forms due to the radiation greatly reduced air pressure and an atmosphere with only 0.16% oxygen. … Human survival on Mars would require living in artificial Mars habitats with complex life-support systems.

Which of the following best describes how the Drake equation is useful?

Which of the following best describes how the Drake equation is useful? It helps us understand what we need to know in order to determine the likelihood of finding other civilizations. … Suppose it turns out that one in 1 million stars has a planet that at some point in its history is home to an advanced civilization.

Which of the following scientists study the Earth’s organisms?

A geologist is a scientist who studies the solid liquid and gaseous matter that constitutes Earth and other terrestrial planets as well as the processes that shape them. Geologists usually study geology although backgrounds in physics chemistry biology and other sciences are also useful.

What is the study of the Earth and its history?

Geology is the scientific study of the origin history and structure of Earth.

How do you maintain the different factors that makes the Earth habitable?

What Are the Factors that Make the Planet Habitable?
  1. It has to be a comfortable distance away from a star (Habitable Zone)
  2. The stars around it have to be ‘stable’.
  3. It should not have a very low mass.
  4. It must rotate on its axis and revolve.
  5. It should have a molten core.
  6. It should hold an atmosphere.

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What makes the Earth habitable water?

The availability of liquid water is the most important factor that makes a planet habitable because water is a very effective polar molecule and hence an excellent solvent and facilitator for the complex chemistry of life.

What makes Earth habitable and unique to other planets in the solar system?

Earth is one special planet. It has liquid water plate tectonics and an atmosphere that shelters it from the worst of the sun’s rays. … The fact that Earth hosts not just life but intelligent life makes it doubly unique.

What is significant about the snow line described in this chapter?

What is significant about the snow line described in this chapter? Inside the “snow line ” it was too hot for volatile substances (such as water methane carbon dioxide and ammonia) to survive. These susbtances would be heated and sublimate [go directly from solid to vapor].

Is there a super Earth?

What is a super-Earth? Super-Earths – a class of planets unlike any in our solar system – are more massive than Earth yet lighter than ice giants like Neptune and Uranus and can be made of gas rock or a combination of both. They are between twice the size of Earth and up to 10 times its mass.

What are these bodies Lo Ganymede and Callisto?

The Galilean moons (or Galilean satellites) /ɡælɪˈliːən/ are the four largest moons of Jupiter—Io Europa Ganymede and Callisto. They were first seen by Galileo Galilei in December 1609 or January 1610 and recognized by him as satellites of Jupiter in March 1610.

Which of the following best describes why the Drake equation is useful in the study of astrobiology?

Which of the following best describes why the Drake equation is useful in the study of astrobiology? It helps us think about the factors that would determine the likelihood that we could discover other civilizations.

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