Due Monday, April 7, 2003, at beginning of class.
Late penalty: 5 points if turned in by 5 p.m. on 4/9.
Assuming all other things (the amount of sunlight and the amount of light
absorbed and reflected by the planet are constant, ignore seasonal effects),
show that the temperature on Mars should be about 10% greater when Mars
is at perihelion than at aphelion? How does this compare to
similar changes on Earth?
Without a greenhouse atmosphere, the temperature on Venus should be about
297 K, yet the temperature is actually 737 K. Using the Stefan-Boltzman
law, show that the surface of Venus receives about 38 times more light
(from the atmospheric greenhouse) than Venus receives from the Sun.
If Mars once had 6 million cubic km of water, and if one-third of the surface
of Mars was covered with an ocean of constant depth, how deep was this
What is the importance of Venus not having a magnetic field in considering
how it may have lost its water?
Explain the 'smoking gun' evidence that Venus once had but lost its water.