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explain how to measure mass and volume of a regular and an irregular solid.

A scale or balance to get the mass and volume of a regular solid. Finding the volume of an irregular solid is best done by placing in a container filled with water halfway or a beaker with volume markings and see how much the water level rises. Subtract the volume of water from the volume of water with the object in the container to get the volume of the object.

Explanation:

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.