Which is one piece of evidence of seafloor spreading? a. fossil material
b. continent material
c. drilled core samples
d. ocean water samples

Note: the following questions are unrelated to the balmer series or the martian. refer to your course notes. a sun-sized star will spend most of its lifetime as a: white dwarf b. red giant c. protostar d. main-sequence star

Which statement correctly describes the relationship between frequency and wavelength?

Amagnetic field applies forces on: a)static chargesb)moving chargesc)water flow