Question

Explain the following terms in your own words.
(a) Lustre
(b) Flotation
(c) Soft and hard materials
(d) Soluble and insoluble materials
(e) Transparent, translucent and opaque materials​

Answer 1

A) The shiny appearance of a material is termed as lustre

B) the ability of a material to float on water is called flotation

C) the materials which cannot be easily compressed or moduled and a called hard materials

materials which can be easily compressed or moduled are called soft materials

D) substance which dissolve in water are called soluble

substance which do not dissolve in water are called insoluble

E) the property of a material to pass light through it is called transparency material that only allow a small amount of light to pass through them are called translucent materials and do not allow any amount of light to pass through them are called Opaque materials