Chapter 7 Book Notes

This property helps life survive on earth • within

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: This property helps life survive on Earth. • Within individual water molecules, the electrons tend to be distributed in a way that makes one side have a net positive charge and the other side have a net negative charge • Conclusion: While water clearly is an excellent medium for supporting life, we do not know if other liquids could also support life. What are the environmental requirements for habitability? • (1) It must have a source of molecules from which to build living cells (2) It must have a source of energy to fuel metabolism (3) It must have a liquid medium – most likely liquid water – for transporting the molecules of life Does life seem plausible on the Moon or Mercury? • Mercury and the Moon don’t have any liquids anywhere • Ice deposited over eons by impacts may lie frozen at the crater bottoms (Moon)S • Ice in lunar craters probably isn’t relevant to the Moon’s habitability, though it may be useful to us as a source of water for future colonies on the Moon • Mercury must have accreted primarily from planetesimals that lacked any ices • Conclusion: The lack of liquid water may make the Moon and Mercury lost causes when it comes to hope for finding life. Could life exist on Venus and Mars? • Venus’ surface is scorching hot • Greenhouse effect causes extreme conditions on Venus • Also called runaway greenhouse effect • Far too hot for liquid water •...
View Full Document

{[ snackBarMessage ]}

Page1 / 2

This property helps life survive on Earth • Within...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online