Jamal recently went on a Northern Lights tour to see the auroras in Iceland. How could the tour guide best describe what creates the aurora? A
The aurora is created when lighting gets trapped in clouds.

B
The aurora is created when a solar storm reaches Earth’s atmosphere.

C
The aurora is created when temperatures in Earth’s atmosphere increase.

D
The aurora is created when Earth is located directly between the sun and moon.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.