Question

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Answer 1

Answer:

the substance or substances of which any physical object consists or is composed: the matter of which the earth is made. physical or corporeal substance in general, whether solid, liquid, or gaseous, especially as distinguished from incorporeal substance, as spirit or mind, or from qualities, actions, and the like.

Explanation:

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Answer 2

Answer:

For example, a mixture of petrol and water is a heterogeneous mixture as both of then do not mix with each other. Density of petrol is higher than the density of water. Therefore, petrol will settle at the bottom.