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10 Cards in this Set
- Front
- Back
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what are the differences between natural and synthetic materials?
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natural materials are materials such as wool or paper. synthetic materials are materials like nylon or rubber
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are all materials made up of chemicals or are they made up of other things as well?
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all materials are made up of chemicals they are either made up of one chemical or a mixture of chemicals. chemicals are made up of atoms or groups of atoms bonded together.
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there are 5 different properties of materials what are they?
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melting point
strength stiffness hardness density |
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what is the meaning of the word density?
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density is a material's mass per unit volume(e.g g/cm3). Don't confuse density with mass or weight
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when making measurements what are the reasons they may not be correct?
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1) there might be a fault with the equipment
2) wrong results can be because of human error. 3) your samples and techniques have to be the same. |
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when making measurements in an experiment how many results should you take and why?
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you should be taking be taking a minimum of 4 results so that you can justify and be certain that you results are right and reliable
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what are the possible uses for plastics?why?
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it could be used for thing such as televisions,computers or kettles because it is fairly hard, stiff and strong.
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what are the possible uses for rubber?why?
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it could be used for car tyres because it is strong, mouldable and flexible.
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what are the possible uses for nylon fibres?why?
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it could be used for ropes and clothing because it is soft and flexible and it has a good tensile strength.
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what is crude oil a mixture of?
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crude oil is a mixture of hydrocarbons-molecules which are made of chains of carbon and hydrogen atoms only. These chains are of varying lengths.
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