Tall, cone shaped mountainous in which layers of lava alternate with layers of ash are called

24-karat gold is considered to be pure gold. 18-karat gold is considered to be about 75% gold. what is 18-karat gold considered a mixture rather than a pure substance? a) it has a variable composition of other elements and minerals. b) its color is different than pure gold. c) the gold atoms are not arranged in a repeating pattern. d) it can be melted and transformed into a different substance.

What role did natural resources play in african politics?

Which of these best describes why president franklin d. roosevelt created the new deal?