Question

what is density ? In simple for class 7​

Answer 1

Answer:

The degree of compactness of a substance.

"a reduction in bone density "

Answer 2

SOLUTION:-

Density is defined as the mass per unit volume of a substance. A substance having a density greater than that of water will sink in it, for example a piece of iron or aluminum. While a substance which is less dence than water will float in it, for example wood, cotton or cork.