Answer:
B
Explanation:
Coal is a non-renewable resource, so the supply can't produce faster than we can mine it.
Answer: Colloid
Explanation:
A suspension comprises of a substance that is dispersed in a liquid. Colloid may result when oil is mixed with water. In colloid , the other substance is merely scattered in a another and form a lower layer when the colloid is left to stand. A dispersion oil in water is called an emulsion. It is a type of colloid.
Answer:
D. The rock cycle is a series of processes in which one kind of rock is transformed into other kinds.
Explanation:
Answer:
The superscript after the letter
tells us the electrons are in the n=2 energy level.
Explanation: