What is the cause of Jupiter's slight flattening, which results in an equatorial diameter 6 greater than its polar diameter?
A) its rapid spin cycle
B) its massive gravitational pull
C) nuclear fission within its core
D) its frequent reversal of its magnetic poles
Question 2
Why is Mars' greenhouse effect negligible compared to that of Earth's?
A) Its mass is only one-ninth of Earth's.
B) Greenhouse gas emissions were greatly curtailed according to the International Mars Greenhouse Gas Reduction Treaty of 2003.
C) The Martian atmosphere is much thinner and retains little heat.
D) Martian carbon dioxide contains a rare isotope with little ability to trap heat.
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