In the field of Design and Technology, 'resistant material' is the term used for materials such as wood, plastic and metal. To describe a resistant material, think about its physical properties, appearance and keeping qualities. A material that deteriorates or rots quickly or disintegrates when it gets wet is not classed as being resistant. Physical properties of a resistant material are very varied. The uses to which they are put usually depends on these properties. For example, a material that is stiff, low density and strong could be used for making an aircraft. When making a lorry or... Show more In the field of Design and Technology, 'resistant material' is the term used for materials such as wood, plastic and metal. To describe a resistant material, think about its physical properties, appearance and keeping qualities. A material that deteriorates or rots quickly or disintegrates when it gets wet is not classed as being resistant. Physical properties of a resistant material are very varied. The uses to which they are put usually depends on these properties. For example, a material that is stiff, low density and strong could be used for making an aircraft. When making a lorry or crane, weight is less of an issue but strength is. Matching a material to the job it is designed to do is a very important part of D and T. But it is important to remember that most resistant materials won't last forever. Wood can be attacked by fungus and insects. Ferrous metals will rust and even plastics can be harmed by the UV rays from the Sun which will weaken them and can change their design properties. Metal is a resistant material. The tool you choose will depend on the material you are working with - wood, metal or plastic - and whether you want to cut a straight line or a curve. Usually, the first tool you will use when shaping your piece of resistant material will be a saw. There are several different types, each with their own specific use. A tenon saw will produce an accurate cut but in a straight line as it is not designed to flex. This saw would only be used on wood as its teeth are only designed to be used on wood. For metals and plastics, you would use a hacksaw, which is made from a different type of steel and has much smaller, finer teeth. For cutting curves, you would use a coping saw and for particularly fine cutting of patterns in wood, a fretsaw would be the best choice. Related Test: KS3 DT - Design and Technology Practice Test: Needs and Likes Show less
In the field of Design and Technology, 'resistant material' is the term used for materials such as wood, plastic and metal. To describe a resistant material, think about its physical properties, appearance and keeping qualities. A material that deteriorates or rots quickly or disintegrates when it gets wet is not classed as being resistant.
Physical properties of a resistant material are very varied. The uses to which they are put usually depends on these properties. For example, a material that is stiff, low density and strong could be used for making an aircraft. When making a lorry or crane, weight is less of an issue but strength is. Matching a material to the job it is designed to do is a very important part of D and T. But it is important to remember that most resistant materials won't last forever. Wood can be attacked by fungus and insects. Ferrous metals will rust and even plastics can be harmed by the UV rays from the Sun which will weaken them and can change their design properties.
Metal is a resistant material. The tool you choose will depend on the material you are working with - wood, metal or plastic - and whether you want to cut a straight line or a curve.
Usually, the first tool you will use when shaping your piece of resistant material will be a saw. There are several different types, each with their own specific use. A tenon saw will produce an accurate cut but in a straight line as it is not designed to flex. This saw would only be used on wood as its teeth are only designed to be used on wood. For metals and plastics, you would use a hacksaw, which is made from a different type of steel and has much smaller, finer teeth. For cutting curves, you would use a coping saw and for particularly fine cutting of patterns in wood, a fretsaw would be the best choice.
Related Test: KS3 DT - Design and Technology Practice Test: Needs and Likes
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