Test 2 Term 2 Flashcards
Name 3 things that materials are made of?
Solids
Liquids
Gas
How do materials change their state?
Heat is added or removed
What are non-metals used for?
They are combined to form new materials with different uses and properties
Give 4 examples of types of metal and what they are used for?
Car - iron
Aeroplane - Aliminium
Electricity - copper
Money coins - copper, zinc, nickel, silver
Define metals
They are: Conduct electricity Ductile Hard Malleable Melt at high temperatures Shine when polished Strong Solid at room temperature
Explain hardness in metals
It can resist being scratched, dented or bent
eg Train Tracks
Explain shine in metals
Metals are shiny when polished.
It can reflect light
Some metals rust when exposed to oxygen
Explain malleability i metals
This means they can be hammered into different shapes.
eg iron can be made into a horse shoe
Explain Ductility in metals
The can be stretched
eg into fences and wire.
Explain melting in metals
They melt at melting point temperature
Name the metal that is liquid
Mercury - it is poisonous and used in thermometers
Explain strength of metals
Metal is strong and is used in construction (bridges, buildings)
Rebars of metal are inside structures
What are properties of non-metals
Do not conduct electricity Do not conduct heat brittle soft dull can be solid, liquid or gas at room temperature
What is rust
Rust is dark brown or red powder. It forms on iron when it is exposed to oxygen.
What is conduct?
To conduct heat or electricity means metal can transfer heat or electricity
