3. Which statement is NOT true about Earth's magnetic field? a. It has reversed directions many times in Earth's past.
b. It originates in Earth's core.
c. It protects Earth from harmful cosmic rays and particles from the Sun.
d. Its strength has remained the same throughout history,

well in order to answer this question you have to provide more information < 3

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.

po-215 i got it right on the quiz