Test: Sorting Materials into Groups

If the particles of a substance have enough energy to partially overcome inter-molecular interactions, then the particles can move about each other while remaining in contact. This describes the liquid state. In a liquid, the particles are still in close contact, so liquids have a definite volume. However, because the particles can move about each other rather freely, a liquid has no definite shape and takes a shape dictated by its container.

Metals when cut, their freshly cut surface has shining.

The property of metals by which they can be beaten into thin sheets is called malleability. Most metals are malleable. Gold and silver are the best malleable metals and can be hammered into very fine sheets or foils. 

Iron nail lose its shine and appear dull due to rusting. Oxygen and water is necessary for rusting. Soft drink contain both of them.

Translucent objects allow some light to travel through them. Materials like frosted glass and some plastics are called translucent. When light strikes translucent materials, only some of the light passes through them. Muslin cloth is translucent material.

Safety pin is made up of either plastic or steel.

Steel can be moulded to get sharp points and plastic is used to seal the edges. Hence steel and plastic are used for making safety pins.

Transparent material is used to make wind screen of a car as it is must to see through them.

Those substances that have shining surface are called as lustrous substance. Diamond, gold and silver are lustrous

Tawa, spade and pressure cooker are made up of metals while eraser is made up of rubber.

The wooden door is an opaque object which does not allow any light to pass through it.