Materials have different properties that make them useful for different jobs. Here are some properties that materials have.
Transparent or opaqueTransparent materials do let light through (you can see through them). Opaque materials do not let any light through (you cannot see through them).
WaterproofWaterproof materials do not let water through and do not soak up water.
AbsorbantAbsorbent materials soak up water and let water pass through them.
Strong or weakStrong materials are very difficult to break. Weak materials break easily.
FlexibleFlexible materials are easy to bend.
RigidRigid materials are difficult to bend.
HardHard materials are difficult to scratch.
MagneticMagnetic materials are attracted to magnets.
ConductorsSome materials are good conductors of heat. This means heat can travel through them easily.
Some materials are good conductors of electricity. This means electricity can travel through them easily.
InsulatorsSome materials are insulators of heat. This means they do not allow heat to travel through them very easily. Some materials are insulators of electricity. This means that electricity cannot travel through them.
MetalsMetals come from rocks called ores.
They are strong, hard and shiny materials that can be hammered into different shapes without breaking.
Many metals are good conductors of heat and electricity.
Some metals are magnetic. Iron is the most magnetic metal. Steel is also magnetic because it is made of mostly iron.
Their properties make them useful for objects such as cutlery, saucepans, cars and coins.