On a weather map, places that have the same temperature are joined with lines called

Isotherms are lines found only in weather maps and the function of these lines are two group areas and regions, that will be having the same temperature. Note, that isotherms are used uniqueley to express temperature, and nothing else.

The image below, shows how isotherms look like.

Hope it helped,

BioTeacher101

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.

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