Question

2 How does a changes happena
A)by heating a substance B)by applying pressur C)by mixing with other substance D)by all these away​

Answer 1

Explanation:

Question 1:

In a physical change

(a) the molecules of the substances do not change.

(b) the molecules of the substances change.

(c) atoms forming the molecules undergo changes.

(d) new substances are formed.

ANSWER:

(a) The molecules of the substances do not change.

Physical changes are reversible, the molecules of the substance remain exactly the same before and after the physical change.