Where are metals and minerals most often found?

Awater molecule is polar because there is an uneven distribution of these between the oxygen and hydrogen atoms.

Which part of the neuron below is indicated by the arrow, and what is its function? hormones send chemical signals throughout the body to regulate other body processes. hormones are chemical signals that are sent throughout the body to regulate other body processes. hormones send electrical signals throughout the body to regulate other body processes. hormones are electrical signals that are sent throughout the body to regulate other body processes.

Ascientific idea becomes valid when it is what?