a material is any substance that can be used to make something.
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what are the 5 different sources the raw materials
earth, sea, air, crude oil and living things.
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what do raw materials need to be before they are useful
raw materials need to be processed before they are useful.
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what does raw materials being processed before they are useful involve
sometimes this involves some sort of chemical change:
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what is it called if a chemical reaction needed to make the material useful
synthetic/man-made material, othewise they are known as natural materials:
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what is a natural material
a material that comes from the earth as a natural resource.
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what is a synthetic material
man-made in a factory.
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what is a material used for dictated by
what a material is used for is dictated by its properties
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scientists can examine the properties of materials and then make a what about?
scientists can examine the properties of materials and then make a decision about which material is best for a particular job.
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what are the physical properties of materials
melting and boiling points.
strength.
hardness.
density.
ability to conduct electricity.
appearance.
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what are the chemical properties of materials
with air.
with water.
with other chemicals.
perhaps with items of food.
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the uses and properties of metals.
uses:
electrical wiring
saucepans
building
jewellry
properties:
good conductors of electricity and heat.
strong.
malleable.
ductile can be drawn into wires.
high melting and boiling point.
lustrous.
some are reactive.
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Other cards in this set
Card 2
Front
what are the 5 different sources the raw materials
Back
earth, sea, air, crude oil and living things.
Card 3
Front
what do raw materials need to be before they are useful
Back
Card 4
Front
what does raw materials being processed before they are useful involve
Back
Card 5
Front
what is it called if a chemical reaction needed to make the material useful
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