Question

What is an example of a physical change?

1. having less ash than the paper that was burned to form it
2. ice forming and then melting back into water
3. rust having a different identity than the iron it forms on
4. the irreversible reaction of vinegar and baking soda

Answer 1

Explanation:

chemical

physical

chemical

chemical

Answer 2

Answer:

Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density. An example of a physical change is the process of tempering steel to form a knife blade.