![]() If something is brittle close brittle Something which is brittle is easily broken or shattered. By applying force to an object you can observe it's physical properties.Physical properties can be seen and can usually be measured quite easily in an experiment. I don’t think a plastic frying pan would be very useful! It’s important to pick the right material for a job based on its chemical and physical properties. ![]() Whereas normal steel will rust when exposed to air and water.Īnd wood will react with oxygen if heated. Like the stainless steel metal in cutlery, which doesn’t react with food and remains shiny after washing. Sometimes, we choose the right material based on its chemical properties - which describe how reactive it is. Whereas other materials, like the glass bulb of this lamp, are brittle. Metal is a good electrical conductor.īoth the metal and the plastic can be easily shaped into long flexible wires - we say they’re ductile. The electric current can flow through the inner metal part of the wire to light the lamp. ![]() And plastic has a lower melting point too.īut plastic is a good electrical insulator, meaning we can touch the outside of electrical plugs and wires without getting an electric shock. Whereas the plastic of the handle doesn’t conduct heat so well, it’s an insulator. Metal is a good conductor of heat, and has a high melting point, making it good to cook with. Physical properties are the basic features of a material that affects how it behaves in different situations. It’s because of the physical properties of the materials. I’m going to find out why we make frying pans out of metal, and why the case around electrical plugs out of plastic, but not the other way round.
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