3 manmade materials
steel, plastic, fiber
copper and tin mix can create ________
bronze
Rocks that have layers are __________ rocks.
Metamorphic
5 Natural materials
gold, rubber, iron, cotton, wood
Rocks that are made from mixed components are called ________
Sedimentary
Why do people create alloys?
to make stronger materials and to avoid corrosion / rust
Thales of Miletus is a __________ (Greek / Canadian) philosopher who noticed the magnetic force on a natural stone.
Greek
copper and zinc can create _________
brass
Metals are made from ________ taken from rocks
ores
A poisonous type of metal is
lead
2 properties of materials
strength, flexibility
Ingenious is take from a Latin word "Ignis" that means _________
fire
The type of magnet which can only last for a short time is___________
temporary magnet
3 types of ore ________
gold, copper, iron ores
these rocks may contain _________ ore.
iron
iron and carbon mix can create ________
steel
humans first used metals about _________ years ago.
5.000
Rocks contains much of ________
mineral
4 properties of materials
lightness, magnetic, elasticity, conductivity to heat / electricity
Natural magnet comes from __________
lodestone
5 properties of materials
strength, flexibility, elasticity, magnetic attraction, absorbency
This rock contains __________ ore.
gold
What is the most malleable metal?
gold
2 uses of magnets
to find direction as in a compass, to run electrical devices and machines
this picture shows that the metal gets _________
corrosion
A type of plastics made from vegetable oil and corn starch is called
bioplastics
3 examples of alloys
steel, bronze, brass