Explain the meaning of the term matter with special reference to the term 'substance'.

Each of the three states of matter has mass. Explain with the help of simple experiments that each state of matter has mass.

A measuring cylinder is filled with water to a particular mark. A piece of solid is immersed inside the measuring cylinder. State why the level of the water in the measuring cylinder will rise up. If the solid is removed, what will be the new level of the water in the measuring cylinder. Give a reason for your answer.

A glass beaker is half filled with water and an empty glass tumbler is inverted and lowered inside the glass beaker. State your observations on tilting the tumbler below the level of the water in the glass beaker. Give a reason for your answer.