The magnetic field is believed to be generated by electric currents in the conductive material of its core, created by convection currents due to heat escaping from the core. So your answer is A
1 meter = .001 kilometers so 4.5 x 10^3 = 4500 so .001 x 4500 = 4.5 kilo
C. A lipid with three unsaturated fatty acids.
(got the question correct on a test)
Iconic +covalent is the answer to this
A flight simulator that helps astronauts prepare for a shuttle launch is an example of a Scientific Model.