Lindsay White
Test por , creado hace más de 1 año

BSc (Hons) Cosmos Test sobre Requirements for the development of life , creado por Lindsay White el 28/10/2016.

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Lindsay White
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Requirements for the development of life

Pregunta 1 de 19

1

What is the definition of life?

Selecciona una de las siguientes respuestas posibles:

  • "a biological system which has the ability to reproduce, mutate and evolve in response to changing environments"

  • "a material system which has the ability to self-replicate, mutate and evolve in response to changing environments"

  • "a material system which has the ability to reproduce, mutate and evolve in response to changing temperatures"

  • "a Biological system which has the ability to self-replicate, mutate and evolve in response to changing temperatures"

Explicación

Pregunta 2 de 19

1

What is the second law of thermodynamics?

Selecciona una de las siguientes respuestas posibles:

  • The entropy of an isolated system not in equilibrium will tend to increase over time, approaching a maximum value at equilibrium.

  • As temperature approaches absolute zero, the entropy of a system approaches a constant minimum.

Explicación

Pregunta 3 de 19

1

What are Advantages of Carbon in the evolution of complex life?

Selecciona una de las siguientes respuestas posibles:

  • Strength & Quantity

  • Size & structure

  • Mass & Volume

  • Speed and Velosity

Explicación

Pregunta 4 de 19

1

which element has the greatest ability to bond with itself creating greater variety and long Chains?

Selecciona una de las siguientes respuestas posibles:

  • Carbon

  • Oxygen

  • Potassium

  • Hydrogen

Explicación

Pregunta 5 de 19

1

The element silicon has similar chemical properties to carbon – it can form four separate chemical bonds, and has been suggested, particularly by science fiction writers, as a basis for life forms, why is it not such a likely candidate as carbon?

Selecciona una de las siguientes respuestas posibles:

  • Chemical bonds are not as strong, cannot form double bonds & and is more likely to bond with Oxygen to for smaller molecules rather than long chains.

  • Chemical bonds are not as strong, it always forms double bonds & and is more likely to bond with Oxygen to for smaller molecules rather than long chains.

  • Chemical bonds are too strong and will not break

Explicación

Pregunta 6 de 19

1

Of all the requirements for life, almost all biologists would agree that water, or some other liquid, is the most important. Complex chemistry is not likely to develop far in the rigid structure of a solid; nor is it likely to develop in a vapour as it would be hard to keep all the working components together.

Selecciona uno de los siguientes:

  • VERDADERO
  • FALSO

Explicación

Pregunta 7 de 19

1

Why is water "Stable"?

Selecciona una de las siguientes respuestas posibles:

  • Water exists as a liquid over a very broad temperature range. At atmospheric pressure this range is 0 to 100°C, whereas at higher pressures the range extends upwards to 363°C. There is no other abundant molecule which significantly overlaps this stable range.

  • Water exists as a liquid over all temperature ranges. There is no other abundant molecule which significantly overlaps this stable range.

  • Water is very unstable.

Explicación

Pregunta 8 de 19

1

Why is water so abundant?

Selecciona una de las siguientes respuestas posibles:

  • It is composed of H (Hydrogen) which is the third most abundant element in the universe.

  • It is composed of O (Oxygen) which is the third most abundant element in the universe.

  • There it a lot of H2O on earth thus abundant.

Explicación

Pregunta 9 de 19

1

Why is Oxygen Chemistry very active?

Selecciona una de las siguientes respuestas posibles:

  • lot of energy is available in chemical reactions involving free (molecular) oxygen

  • lot of energy is available in chemical reactions involving fixed (molecular) oxygen

  • Oxgyen emits lots of energy

Explicación

Pregunta 10 de 19

1

What are Environmental Conditions?

Selecciona una de las siguientes respuestas posibles:

  • Temperature, atmospheric composition, mass and age

  • Time & Water present.

Explicación

Pregunta 11 de 19

1

What other conditions are necessary to protect life?

Selecciona una de las siguientes respuestas posibles:

  • Protection from radiation, Moderate and stable temperatures & Atmospheric recycling mechanisms.

  • Protection from solar winds, Moderate and stable temperatures & Atmospheric recycling mechanisms.

  • Protection from solar winds, Moderate and water source & Atmospheric recycling mechanisms.

Explicación

Pregunta 12 de 19

1

Is Short wavelength radiation is damaging to biological tissues?

Selecciona uno de los siguientes:

  • VERDADERO
  • FALSO

Explicación

Pregunta 13 de 19

1

On Earth we are protected from the malign effects of UV radiation by a thin layer of ozone. Which atom makes up the ozone?

Selecciona una de las siguientes respuestas posibles:

  • OZone, a molecule composed of three oxygen atoms, which absorbs the radiation.

  • OZone, a molecule composed of three hydrogen atoms, which absorbs the radiation.

  • OZone, a molecule composed of three carbon atoms, which absorbs the radiation.

  • OZone, a molecule composed of three nitrogen atoms, which absorbs the radiation.

Explicación

Pregunta 14 de 19

1

What is the The Habitable Zone?

Selecciona una de las siguientes respuestas posibles:

  • 0.6 to 1.5 astronomical units from the sun

  • 1.5 to 3 astronomical units from the sun

  • 3 to 6 astronomical units from the sun

  • 6 to 9 astronomical units from the sun

Explicación

Pregunta 15 de 19

1

What will happen if the planetary surface is too close to the star?

Selecciona una de las siguientes respuestas posibles:

  • Too much heat / Radiation

  • Not enough heat and too much radation

  • Not enough radiation to hot

Explicación

Pregunta 16 de 19

1

What happens to water the surface of a planet if its too close to the surface of a star?

Selecciona una de las siguientes respuestas posibles:

  • Liquid water will not exist, the surface will be too warm, ultraviolet radiation from the central star may dissociate the water, breaking H2O into its constituents H and O.

  • Water is permanently frozen.

Explicación

Pregunta 17 de 19

1

What other factors determin whether a planet can maintain liquid water

Selecciona una o más de las siguientes respuestas posibles:

  • Mass of the planet

  • Geothermal activity

  • Shape and density

  • Atmosphere

Explicación

Pregunta 18 de 19

1

What is the greenhouse effect?

Selecciona una de las siguientes respuestas posibles:

  • The presence of "greenhouse gases" in the atmosphere of a planet leads to warming of the surface

  • A planet being close to the sun thus being very hot

  • The Ozone layer stopping heat escaping the atmosphere

Explicación

Pregunta 19 de 19

1

The Earth’s crust is broken up into large rigid plates, which move slowly across its surface, riding on a hotter deformable layer. This is called?

Selecciona una de las siguientes respuestas posibles:

  • plate tectonics

  • Movable plates

  • Floating Plates

  • Tectonic ridges

Explicación

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