Some useful properties of materials are the degree of transparency to light, magnetic property, heat conductivity, and (a)   conductivity

Poor conductors of heat are also called (a)   of heat

When we are choosing materials to make an object, we need to know the properties of the materials and the ... of the object

(a)  

The types of waste include recyclable waste, non-recyclable waste and (a)   waste

We should store corrosive chemicals away from (a)   objects as they can cause metals to corrode

A change only in the appearance of a substance is called a (a)   change

Physical changes can be caused by various factors, such as force, light and (a)  

Examples of physical changes is (a)   glass

The change that involves a chemical reaction is called a (a)   changes