5288019
Descripción
Fichas por Ella Maggs, actualizado hace más de 1 año
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Creado por Ella Maggs
hace más de 8 años
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| Pregunta | Respuesta |
| Name the only metals that rust. | Iron and steel. |
| What two factors accelerate rusting? | Acid rain and salt water |
| What is the word equation for rusting? | iron + oxygen + water --> hydrated iron oxide |
| Why does aluminium not corrode in moist air? | It does not rust because in moist air it forms a protective layer of aluminium oxide. |
| Why is aluminium used in car bodies and wheel hubs? | Its doesn't corrode, low density, malleable and is reasonably strong. |
| Why is steel or iron used for car bodies? | Both materials are strong and malleable. |
| Why is lead used in batteries? | A chemical reaction with lead oxide produces electricity. |
| Why is plastic used in dashboards, dials and bumpers. | It is rigid, doesn't corrode and is cheap. |
| Why is PVC in metal wire coverings used? | PVC is flexible, is a good electrical insulator and does not corrode. |
| Why is glass/plastic composite used for windscreens? | It is transparent, and shatterproof although it may crack. |
| Why is fibre used in seats? | It is hard wearing and can be moved and dyed into textiles. |
| Name the advantages of of using aluminium compared to steel for a car body. | Aluminium is lighter and more resistant to corrosion than steel. A lighter body means better fuel economy, the body will also last longer. |
| Both steel and aluminium are malleable, what does this mean? | It means both materials can be easily shaped. |
| Name some advantages about steel compared to aluminium. | Steel is cheaper and stronger. |
| Name three advantages of recycling materials from old cars. | -Less waste in landfills. -Fewer toxic materials are dumped, such as lead from batteries. -Less crude oil is mined from the ground. |
| Name three disadvantages of recycling materials from old cars. | -Fewer mines are built so there are fewer jobs. -It is difficult and time consuming to separate materials. -Some recycling processes are expensive. |
| How has the government tried to protect the environment? | There are laws which specify that a minimum percentage of the car must be made from recyclable materials. |
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