Different types of metamorphic rocks are distinguished by the:
a. chemical make-up of the rock.
c. location of the rock formation.
b. location in which the rock was found.
d. arrangement of mineral grains within the rock.

¿cual es mas alta en baja california,la migracion o la inmigracion?

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.

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4