Was Abu Bakr a prophet true or false? needa know asap

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.

Which layer surrounds the center of the earth? a: crust b: core c: mantle

Which statement best describes how chemical equations demonstrate conservation of mass?