da Erin Geldart mancano 4 anni
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Appearance
Waterproof
Strength
Mixing and cooking
Cooking is a form of processing
Mix different materials together
Add heat
Keep at room temperature
Remove heat
Mixing and Setting
Concrete
Mix cement, sand and water. Once set the wet concrete becomes hard.
Jelly
Mix jelly powder, hot water and cold water together. Allow to set in the fridge.
Allow your mixture to set before use
New materials often have different properties to the original material
Baking a cake: flour, eggs and cocoa do not taste very good on their own but as a final product the cake is delicious
Paint
Changes the colour of an object
Rain jacket
A waterproof coat to keep us dry
Materials can be used for many different uses depending on their properties
Materials that have not been processed are called raw materials
Natural materials
When a raw material is found in the form it is in nature
Metal from a mine
Crude oil
Honey
Raw materials are made into other things
Processed materials
Glass
Steel
Paper
Built by humans
Refined
Sulphur
Soft
Poor conductors of heat/electricity
Neak
Brittle / break easily
Dull / lack lustre
When you add two metals together you are crating a material with more favourable properties
Examples
Iron
Corrosive
Rusting
Metal + O2 + H2O = Rust = Brittle
Ductile
Good conductors of heat/electricity
Mallaeble
Shiny surface
Durable
Electrically conducted
No definite volume
No definite shape
Neon lights
Steam
Have no definite shape
Takes up the space available
Water
Takes the shape of the container it is in
No fixed shape
Can flow
Properties
Definite shape
Small spaces
Fixed shape
Example
Ice
