materials
TRANSCRIPT
Unit 5Materials
5th Grade2015/2016
What do I know?
MATERIALS
What’s the difference between natural and artificial materials?
MATERIALSMaterials can have different origins.
NATURAL
ARTIFICIAL
MATERIALSMaterials can have different origins.
• They are obtained directly from nature.
• For example:NATURAL
• Humans make them from natural materials.
• For example:ARTIFICIAL
RAW MATERIALSHumans use different materials to make what they need.
These materials come from natural resources called RAW MATERIALS.
RAW MATERIALSRaw materials can come from different sources:
OF ANIMAL ORIGIN
OF PLANT ORIGIN
STONE MATERIALS
USED IN CONSTRUCTION• • •
USED AS AN ENERGY SOURCE• •
MINERALS
RAW MATERIALSRaw materials can come from different sources:
OF ANIMAL ORIGIN
Leather
Wool
Silk
OF PLANT ORIGIN
Plants
Wood
Cotton
STONE MATERIALS
USED IN CONSTRUCTION• Marble• Granite• Gypsum
USED AS AN ENERGY SOURCE• Coal• Oil
MINERALS
Bauxite
Precious stones:
diamonds and rubies
RAW MATERIALS OF ANIMAL ORIGIN
RAW MATERIALS OF PLANT ORIGIN
STONE MATERIALS
STONE MATERIALS
MINERALS
Classify these materials
NATURAL
ARTIFICIAL
paper wood plastic steel wool glass leather silk
Classify these materialspaper wood plastic steel
wool glass leather silk• wood• wool• leather• silk
NATURAL
• paper• glass• plastic• steel
ARTIFICIAL
Properties of materials
Properties of
materials
HARDNESS
CONDUCTIVITY
THERMAL INSULATION
ACOUSTIC INSULATION
WATERPROOF
Name the properties of these materials:
Wood
Silk
Marble
Iron
Plastic
Cork
Latex
Wool
Glass
Leather
Materials used in the manufacture of a scooter
Materials used in the manufacture of a necklace
Materials used in the manufacture of a watch
TASK 1: WE ARE INVENTORS!
Invent and object. Draw it.Describe its utility.Choose the materials it is made of and explain why you chose them.
WILF (What I Look For)-Presentation-Language-Creativity- Description of the utility of the object.-Description of the materials.
SPECIAL CUTLERYDescription: this cutlery set has got a tank to save salt, sugar, pepper and other spices. They are very useful because you can season your food at the same time you eat.
Metal. The blade of the knife is made of metal because it is hard and resistant.
Wood. The corpus is made of wool because it is thermal insulator. Therefore, when we eat, we don’t get burned.
Diamond. The box of the set is made of diamond because it is hard and transparent.
TECHNOLOGY HAS ADVANCED WITH THE INVENTION OF NEW MATERIALS
Glass. It is transparent and can be made into many shapes. We use it to make glasses, bottles, windows and mirrors.
Paper. It is made from cellulose obtained from wood. We use paper for newspapers, books, bags…
New fabrics. New textiles have been developed. Elastic and waterproof materials are good thermal insulators and used to make swimwear.
TECHNOLOGY HAS ADVANCED WITH THE INVENTION OF NEW MATERIALS
Semiconductors. They are used in the electronic circuits of computers, in laser devices, in lightning, etc.
Superconductors. They conduct electricity very well. They are used:
-in magnetic levitation trains-for transporting electric current in devices.
Quantum levitation: https://www.youtube.com/watch?v=Ws6AAhTw7RA
TECHNOLOGY HAS ADVANCED WITH THE INVENTION OF NEW MATERIALS
Fibreglass. It is very resistant and easy to shape. It is used in cars and ships.
Optical fibre transmits light.
TASK 2: GRAPHENE
Read the text about grapheneDescribe its properties.Explain its applications.
WILF (What I Look For)-Presentation-Language-Description of its properties.-Explanation of its applications.