No. It is a physical or mechanical change.
YES by crushing it into smaller particles we increase the surface area thereby increasing its contact with the solution
Compounds can be decomposed by chemical reactions.
Crushing a rock is a physical change. It is still rock, just in smaller bits.
Smaller particles of rock are produced from larger particles.
to grind rocks into smaller pieces
physical, chemical or biological breakdown of rocks and minerals into smaller sized particles.
It is physical. The tooth is broken into smaller pieces, but the pieces are still made of the same substances.
No, absolutely not. There are much smaller particles, first Electrons (which are part of reactions), Then Quarks that neutrons and protons are made of (and are part of reactions), and much, much smaller particles after that also are involved in chemical reactions.
physical, because the chemical composition of the aspirin stays the same. only it's physical state changes from a solid pill to a powder.
The size of the particles of solute do not affect the solubility of a substance, which is determined by its chemical composition, but it does affect how quickly it dissolves. The smaller the particles of the solute, the faster it will dissolve.
Only with fission (see nuclear science).
I would say it is a physical change the chalk is being reduced to a smaller size. It still remains chalk.