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material properties - Coggle Diagram
material properties
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material and their uses
materials and objects
materials are the substance we use to make objects. for example, we can use wood to make a table or a matchstick. the objects made (the table and the matchstick) are very different but the material used to make them (wood) is the same.
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using materials
the material that we choose to make a particular object depends on what the object is used for. for example, we might need to make some packing material to protect a TV in its box when it gets moved around. the main property in the material for the packaging will be softness. if the TV box gets knocked, the packaging is needed to cushion the blow.
packaging is often made of a material called expanded polystyrene. it is a plastic that has gas blown into it as it sets. the trapped bubbles of gas make the packaging very spongy and soft. another useful property of expanded polystyrene is its low density. this is useful when transporting electrical goods around. less fuel is used in vehicles delivering the goods and the boxes are easier to lift.
more physical properties
more physical properties
the materials used to build homes and used in homes have very different properties. for example, slate tiles are used for roofs in countries with wet climates. slate is a rock that is waterproof. water cannot pas through, so it is ideal for making roof tiles. moreover slate rock can be split into thin sheets which can be cut to make regular-shaped tiles.
absorbent materials
materials are chosen for certain uses because of their special properties. in the kitchen for example, we use paper towels to mod up liquid spills
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