Coal is a fuel before it is burnt
A. chemical energy B. electric potential energy C. heat energy​

Look at the images of different rocks. which rocks have a fine-grained texture? check all that apply. 1 2 3 4 5

Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases

Which direction does the energy flow in this energy pyramid ?