Crushing a piece of chalk is only a physical change. Chemically, it is still chalk.
physical
phicical
I would say it is a physical change the chalk is being reduced to a smaller size. It still remains chalk.
No, it is a physical, not chemical change.
physical
Grinding chalk to chalk dust is a physical change because the texture and size may change but the its molecules are still the same.An example of chemical change is burning paper because ash is chemically different from paper.
When you crush a piece of chalk you get lots of small pieces of chalk.It is only a physical change. It is not a chemical change.
I would say it is a physical change the chalk is being reduced to a smaller size. It still remains chalk.
No, it is a physical, not chemical change.
physical :)
physical
Grinding chalk to chalk dust is a physical change because the texture and size may change but the its molecules are still the same.An example of chemical change is burning paper because ash is chemically different from paper.
When you crush a piece of chalk you get lots of small pieces of chalk.It is only a physical change. It is not a chemical change.
Chemical physical is something like... a dent in metal, a cut in a tree, etc chemical is a reaction like ^acid on chalk or wood burning
It's a physical change because it's only changing size and shape, not converting chemicals.
After a piece of chalk is pounded by a fist or rolling pin or other object it normally get crushed and turns into lumpy powder.
Besides for rearranging the glass pieces, one is not actually changing the chemical formula of the glass. Much like grinding NaCl, the crystals get smaller but the chemical remains the same.
It doesn't matter if something is reversible or irreversible. it will not depend if it is a chemical or physical change. A physical change is when the composition of a substance remains unaltered (the particles stay the same) and no new substance is produced. Such as when you make a paper plane out of paper, the appearance changed, the particles stayed the same, no new substance was created, and the paper remains paper. A chemical change is when the composition of a substance is altered and a new substance is produced. Such as when paper is burned, the new substance produced is the carbon and other gases from the fire, and the composition of the paper changes, slowly disappearing.It usually is unless you draw so rapidly that the heat of the friction heats the paper and causes it to smoke.
The physical properties of a crayon include the size, color, it is waxy, crumbly, and slippery. The chemical properties are flammability.