Correct Answer : 64,000 km above the earth's surface
Correct Answer : All of the above
Correct Answer : plate tectonics
Correct Answer : 1/50 th
Correct Answer : 50 to 1000 mm of rainfall a year
Correct Answer : Cosmography
Correct Answer : Africa
Correct Answer : summer and winter solstices
Correct Answer : coal, Fe, Mn, Cu, Mica, U, diamond