Q: You are presented with the quiz "some light bulbs convert electricity into light and the amount of what?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "some light bulbs convert electricity into light and heat energy" and "heat energy is the amount of energy in a substance". So, what's the best answer to the question?

Choose your answer from:
(1). energy in a substance
(2). hydrogen and oxygen
(3). It decreases
(4). matter vibrating
(5). Inches or fractions of inches.
(6). reducing acid rain
(7). harmful substances
(8). Males and females
A:
(1).