Electrons man. I think. Nah, I pretty sure....
Answer:
D. A bicycle rusting.
Explanation:
A. is incorrect because tearing a piece of paper is a physical change, not a chemical change.
B. is incorrect because we are just heating up the object. That only changes how fast the particles are moving and the change in state of matter.
C. is incorrect because we are adding heat to change a state of matter (from solid to liquid) and it is a physical change.
Therefore, only D. is the correct answer. Iron rusts, and when it does, it chemically changes into an iron oxide (rust).
The kilometer is the independent, since it stays the same, and the increasing his exercise time is the dependent since that’s what’s changing
The answer to this obvious question is true
The species of the animals was the same
