Today, glaciers cover approximately ________ percent of the earth's surface
A) 50 B) 10 C) 30 D) 1
B
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London, UK is on the Prime Meridian. Using the 90 degrees West longitude for Chicago, what is the time in London if Chicago's time is 8 AM?
A) 3 AM B) 2 PM C) Noon D) Midnight E) 5 PM
Total Annual CO2e emissions are greatest in ________
A) India B) China C) Indonesia D) Brazil E) European Union
From this cross section of the Grand Canyon, what is the boundary between the various Precambrian rocks and the Paleozoic sedimentary units?
A. It generally is an unconformity and represents more time in the right part of the diagram than in the left part of the diagram. B. It is a depositional contact, probably representing only a short period of geologic time. C. It is an angular unconformity in most places and a nonconformity where it overlies granite. D. All of these.
Atoms of the same element but with different atomic mass are called
A. radioactive. B. molecules. C. ions. D. isotopes.