100+ Properties of Matter Questions and Answers Pdf - 2

Question: 6

What is viscosity?

The resistance offered by fluids to relative motion between its different layer is called viscous force. This property is called viscosity.

Question: 7

What is called universal solvent?

Water is called universal solvent because it dissolves many substances.

Question: 8

Why iron is heavier than the wooden sphere?

The mass of iron is more than the mass of the wood. Therefore, Iron is heavier than the wooden sphere.

Question: 9

What is the relationship between pressure gradient and wind speed?

Winds always blow from high pressure areas to low pressure areas.

When the pressure gradient is steep, the velocity of the wind is also high.

If the pressure gradient is gentle, the velocity of the wind is low.

Question: 10

How do we understand the pressure gradient?

The pressure gradient can be understood from the spacing of isobars. Closely spacing isobars denote steep pressure gradients, whereas far spaced isobars denote gentle gradients.