The atmosphere is held together by
a. the greenhouse effect
b. solar radiation
c. ozone
d. gravity

Which fators influence ocean currents

The discovery of the electron as a subatomic particle was a result of

It's time for santa to deliver his presents. assuming he delivers presents all over the world, he has to travel about 75,000,000 miles. if he travels east to west, he can use the time zones to make christmas day last 31 hours. what speed, in miles per hour, must santa fly to get all of his presents delivered?