Answer:
The length of the two wires
Explanation:
A control variable is what you keep the same through the whole experiment so therefore it could be both length and diameter
True. if thats what you're looking for
Answer:
B.
burning of fossil fuels
it increase the amount of carbon present in atmosphere.
When boys go through puberty their voices change and they start to grow hair on different area of their body such as their chest, face and pubic area. Also they will start to get acne
