Question

11:17 Home Announcements determine the temperature ot a planet. Can you relate each of these things to a way in which you control your own body temperature? You overhear a two people arguing on the subway about whether or not life could exist based on liquid ethane instead of water. You decide to tell them why water is such a special molecule. Give them at least three properties of water that make it unique and describe why these are important for life As part of a class exercise, you searched through exoplanets for ones that might be able to support life. What are the three requirements for all life? How did these requirements relate to your search, in particular the temperature of the star, the atmosphere of the planet, and the density of the planet? A science fiction writer asks you about what it would be like to live on Mars. Describe Mars in terms of water temperature, atmosphere, and seasons. For full credit, add at least three other features that you think would help her write her story Describe at least three of these exploration missions to Mars: Mars Reconnaissance Orbiter, Mars Curiosity Rover Mars Express, MAVEN, Mars Opportunity and Spirit Rovers. Posted by: Jacqu

Answer 1

1) The minimum and maximum temperature of earth can fluctuate between -89⁰C to 58⁰C. Human body is a very complex thing and it has its own feedback mechanisms to regulate the bodies temperature with response to the outside temperature.When the temperature increases body reacts to the external temperature change by sweating enabling the temperature to be in the optimum level.When the temperature falls too low shivering occurs thereby keeping blood vessels to contract and keep the body warm.

2) Water undoubtedly is a special and unique molecule which can not be replaced for life to survive.There are many life sustaining properties which water has and three of them are:

• High Heat capacity: This property of water enables life forms to regulate the body temperature.
• Capillary action of water: This property of water allows plants to take up water through it roots and stem.
• Anomalous behaviour of water at 4⁰C makes it float on water and this property of water helps aquatic organisms to survive at very cold temperatures.

3) The three basic requirements for all life are:

• A source of energy.
• Habitable atmosphere
• Availibility of water

These could specifically relate to the temperature because an optimum range of of temperature is very essential for survival and for chemical reactions to take place, and at extreme temperatures these life processes will not function.

Atmosphere should constitutes the essential elements required for life and to also protect from harmful UV rays.Other climatic conditions such as pressure,wind movement,humidity and rainfall will also be needed for the atmosphere to support life.

Density of the planet is important because density of the planet can give us hint about the planets composition very less dense planets may only have gas in it unlike earth which also has a rocky composition.