Matter in Our Surrounding Test - 2

The theory which visualizes that solid, liquid or gas is made up of tiny particles which are in constant motion is called kinetic theory of matter.

In  gases, there are large spaces between the particles.

Hence, on applying pressure, the spaces between the particles can be reduced easily as compared to solids and liquids. Example, the LPG cylinders used at home and the CNG cylinders used in vehicles.

Spaces between atoms and molecules are different in different substances. When we make tea, coffee or lemonade, particles of one type of matter intermix with the particles of other type of matter. They do so by getting into the spaces between the particles.

Anything that occupies space and has mass is called matter.

All given materials are made up of matter except sound.

Sound has no mass and doesn't occupy any space hence it is not considered as matter.

The gases can be liquefied by applying pressure and reducing the temperature.
When a high pressure is applied to a gas, it gets compressed and if the temperature is lowered, the gas is liquefied.

Water boils at 100^oC i.e. 373 K and freezes at 0^oC i.e. 273 K.

The newly discovered fifth state of matter is called Bose-Einstein condensate.

Liquids do not have a fixed shape but have a fixed volume. Liquids take up the shape of the container in which they are poured.

Gases neither have a definite shape nor a definite volume. They take up the shape of the container in which they are filled. Example: Air filled in the balloon.

A sponge has minute holes, in which air is trapped. When we press the sponge, air is expelled out and we are able to compress it.