An Objective lens has three times the magnification of the eyepiece. If the total magnification is 160X. What will be the magnification of both the Objective lens and that of the eyepiece. (show your work)

What is thought to have caused the mass extinction at the end of the cretaceous period?

What would happen if the krill were removed from the food web

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils