There are long, underwater mountain chains that divide the sea
floor and generate new sea floor as magma rises and erupts
onto earth's surface. what are these mountain chains known as?
magnetic poles
o mid-ocean ridges

ocean trenches

subduction zones
the point within the earth where the earthquake originates: *

Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution? a. 3.88 m, b. 1.03 m, c. 1.5 m, d. 15.5 m

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

The molar mass of iron(fe) is 55.8 g/mol. what is the mass in grams of 2.25 moles of iron?