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eraser
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seesaw
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fairy
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25
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thief
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20
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4 properties of materials
lightness, magnetic, elasticity, conductivity to heat / electricity
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15
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2 properties of materials
strength, flexibility
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20
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Rocks that are made from mixed components are called ________
Sedimentary
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10
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humans first used metals about _________ years ago.
5.000
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20
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To make a metal, we take the mineral from rocks and then ________ it.
molten
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15
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A type of plastics made from vegetable oil and corn starch is called
bioplastics
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seesaw
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magnet
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fairy
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thief
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10
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3 manmade materials
steel, plastic, fiber
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10
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this picture shows that the metal gets _________
corrosion
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15
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The type of magnet which can only last for a short time is___________
temporary magnet
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10
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What is the most malleable metal?
gold
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25
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Why do people create alloys?
to make stronger materials and to avoid corrosion / rust
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20
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Natural magnet comes from __________
lodestone
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15
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3 examples of alloys
steel, bronze, brass
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star
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gift
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thief
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