Electrical/heat conductivity - Ability to allow heat or electricity to travel through them (Insulators do not allow heat or electricity to travel through them at all
Good conductor of electricity - Steel
Good conductor of heat - Iron
Bad conductor of electricity - Rubber
Bad conductor of heat - Glass
Transparent - Ability to allow light to pass through
Transparent: Allow light to pass through completely e.g. clear glass
Translucent: Allow some light to pass through e.g. tracing paper
Opaque: Does not allow light to pass through at all e.g. wood
Waterproof -Able to prevent water from passing through them
Waterproof- Metal
Not waterproof - Paper
Experiment to test for conductivity
Cells represent batteries
Degree of transparency
Magnet
Broken glass
Umbrellas are waterproof
groups of materials
Wood:
Comes from trees, hence, it is once alive
Is an insulator of heat and electricity
Depending on its thickness, it can strong or weak. A thin wood is often weak and breaks easily e.g. chopsticks, whereas a thick wood is often strong and does not break easily e.g. wooden furniture
Metal:
Strong, hard and shiny
When forces are applied e.g. being hit, it will change shape, but it will not change shape
Good conductors of heat and electricity
Some are magnetic, some are not, iron, steel, nickel and cobalt are magnetic
Glass:
Normally transparent
Can be made into many various shapes
Depending on its thickness, it can be strong or weak. A thick glass is strong and might not break as easily as thin glass, which is brittle and breaks easily.
Rubber
Poor conductor of heat and electricity
Is flexible and can be bent out of shape
Plastic
Are man made from chemicals
Strong and waterproof
Can be made into different shapes when heat is applied to plastic
Can also be coloured or transparent
Not magnetic and is bad conductor of electricity and heat
Fabric
Some fabrics are natural, while some are man made, known as synthetic fibres
Some are stretchy, some are insulating (keeps you warm) and some are absorbent as well.