Answer:
its value depends on the streak colour, hardness, colour, and if it is a meteorite or not
Explanation:
Imaginary line or Half of the earth dividing north east west or south.
Because once they are all gone we will not get them back for several millions of years or we may never get them back
I think it's A but here's an explanation anyway: as you heat the crude oil, the different hydrocarbons, having different boiling points, boil and evaporate up the column. Those with lower boiling points, shorter in chain length, will condense nearer the top of the fractional distillation column. Those that are more viscous, larger in chain size, will have high boiling points, so will evaporate last and condense lower down in the column. Therefore, you achieve all the different oils / materials (oil, petrol, gasoline, tar etc etc). I hope this helps. If not, then a good website to use is 'BBC bitesize, fractional distillation'.
