Rocks are classified as sedimentary, metamorphic, or igneous on the basis of the
a. age of the rocks.
b. way the rocks were formed.
c. types of fossils the rocks contain.
d. number of minerals found in the rocks.

How manyatoms of mercury are in 1.4214e+1 ml sample

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?