Why do you think we use asphalt and tars/waxes (heavier, thicker, higher boiling point fraction) in our roads and roof coatings? Why not use gasoline of diesel in a roof coating or road (what would it do, what is its problem)? b) Could you burn tar as a fuel in your car? If so, what would you have to do to it to make it work?

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).

b. accuracy of the data matters alot more than its number of digits, organization or amount of detail. quantitative observation is more accepted than the qualitative observation.