DT REVISION
Q: What is the Eatwell Guide?
A: A guide showing the proportions of different food groups needed for a healthy, balanced diet.
Memory Tip: Think 5-5-2-6
5 food groups
5 fruit & veg
2 fish portions
6–8 drinks
Q: How many portions of fruit and vegetables should you eat per day?
A: At least 5 portions.
Q: How many portions of fish should you eat per week?
A: 2 portions, with at least 1 oily fish.
Q: How many glasses of fluid should you drink each day?
A: 6–8 glasses.
Q: What is healthy eating?
A: Eating a balanced diet that provides the nutrients and energy needed to stay healthy.
Q: Why should you eat more fibre?
A: To help the digestive system work properly.
Q: Why should you eat less fat?
A: Excess fat is stored in the body.
Q: Why should you eat less sugar?
A: It causes tooth decay and excess sugar is stored as fat.
Q: Why should you eat less salt?
A: It increases blood pressure and can damage the kidneys.
Q: Why should you eat oily fish?
A: It provides essential fatty acids that the body cannot make.
Q: Why should you drink about 2 litres of fluid per day?
A: To stay hydrated.
Q: Why should you eat at least 5 portions of fruit and vegetables a day?
A: For vitamins, minerals and fibre.
Q: Why should you eat more complex carbohydrates?
A: They provide slow-release energy and keep you fuller for longer.
Q: Why should you eat less saturated fat?
A: It can lead to cholesterol build-up and heart disease.
Q: Why should you not skip breakfast?
A: It gives energy and raises blood sugar levels for the day.
Q: What are micronutrients?
A: Vitamins and minerals needed in small amounts for healthy growth, development and wellbeing.
Memory Tip: Micronutrients = Vitamins + Minerals
Q: What is dextrinization?
A: The browning of starchy foods when heated.
Memory Tip: Think of toast turning brown.
Q: Give an example of dextrinization.
A: Toast turning golden brown.
Q: What is a ferrous metal?
A: A metal that contains iron.
Memory Tip: Ferrous = Fe = Iron
Q: What is a key property of ferrous metals?
A: They are usually magnetic.
Q: What is a non-ferrous metal?
A: A metal that does not contain iron.
Q: What is an alloy?
A: A mixture of two or more metals (or a metal and another element) to improve properties.
Q: What is galvanisation?
A: Coating steel with zinc to prevent rusting.
Q: What is ductility?
A: The ability of a material to be drawn into a wire without breaking.
Q: What is malleability?
A: The ability of a material to be hammered or shaped without breaking.
Q: What are the properties of mild steel?
A: Tough, easy to form, cheap, rusts if unprotected.
Q: What are mild steel’s uses?
A: Nuts, bolts and bike frames.
Q: What are the properties of cast iron?
A: Can be cast in moulds and rusts easily.
Q: What are cast iron’s uses?
A: Manhole covers, pans and gates.
Q: What are the properties of high carbon steel?
A: Hard-wearing and sharpens well.
Q: What are high carbon steel’s uses?
A: Tools.
Q: Which four non-ferrous metals should you remember?
A: Zinc, Aluminium, Copper and Tin.
Memory Tip: ZACT
Q: What are zinc’s properties and uses?
A: Brittle, blue-grey, used for galvanising steel.
Q: What are aluminium’s properties and uses?
A: Lightweight, strong, ductile, used for cans and kitchen utensils.
Q: What are copper’s properties and uses?
A: Good conductor, rose coloured, used for wiring and plumbing.
Q: What are tin’s properties and uses?
A: Soft and malleable, used for food cans.
Q: What is brass made from?
A: Copper and zinc.
Q: What are brass’s uses?
A: Musical instruments and ornaments.
Q: What is stainless steel made from?
A: Chromium, nickel and manganese.
Q: What are stainless steel’s uses?
A: Cutlery, sinks and saucepans.
Q: What is high speed steel made from?
A: Tungsten, chromium, vanadium and carbon.
Q: What are high speed steel’s uses?
A: Drill bits and saw blades.
Q: What is a circuit?
A: A complete path through which electricity flows.
Q: What is an input?
A: A component that starts or controls an electrical circuit.
Q: Give three examples of inputs.
A: Switch, thermistor, pressure pad.
Q: What is a process?
A: The part of a system that receives information from an input and controls the output.
Q: What is an output?
A: A component that produces a result from an electrical circuit.
Q: Give four examples of outputs.
A: LED, bulb, buzzer, speaker.
Q: How does an electronic system work?
A: Input → Process → Output.
Memory Tip: Press button → Circuit thinks → LED lights up.
Q: What is softwood?
A: Wood from coniferous trees.
Memory Tip: Coniferous = Softwood
Q: What is hardwood?
A: Wood from deciduous trees.
Memory Tip: Deciduous = Hardwood
Q: What is a manufactured board?
A: A board made from wood waste, fibres or veneers bonded together.
Q: What are the properties of pine?
A: Lightweight and easy to work with.
Q: What are the properties of larch?
A: Tough and water resistant.
Q: What are the properties of spruce?
A: High strength-to-weight ratio.
Q: What are the properties of cedar?
A: Naturally water resistant.
Q: What are the properties of oak and ash?
A: Strong and common hardwoods.
Q: What is special about beech?
A: It doesn’t splinter.
Q: What are the properties of mahogany?
A: Tough and attractive red colour.
Q: What is special about balsa wood?
A: Very lightweight but strong for its weight.
Q: What are the properties of chipboard?
A: Cheap but chips easily.
Q: What are the properties of MDF?
A: Dense with a smooth surface.
Memory Tip: MDF = Most Dense Finish
Q: What are the properties of plywood?
A: Layers glued together, strong, water-resistant versions available.
Q: What is a natural fibre?
A: A fibre that comes from plants or animals.
Q: Give three examples of natural fibres.
A: Cotton, wool and silk.
Q: What is a synthetic fibre?
A: A fibre made from oil-based chemicals.
Q: Give three examples of synthetic fibres.
A: Nylon, polyester and elastane.
Memory Tip: Synthetic = Oil-based = Not biodegradable
Q: What are the properties of cotton?
A: Absorbent and creases easily.
Q: What are the properties of wool?
A: Warm and a good insulator.
Q: What are the properties of silk?
A: Smooth and strong.
Q: What are the properties of nylon?
A: Very strong and abrasion resistant.
Q: What are the properties of polyester?
A: Strong and holds colour well.
Q: What are the properties of elastane?
A: Very stretchy.
Q: What is a woven fabric?
A: Fabric made by interlacing warp and weft yarns.
Q: What are the properties of woven fabrics?
A: Strong and tear in a straight line.
Q: What is a knitted fabric?
A: Fabric made from interlocking loops of yarn.
Q: What are the properties of knitted fabrics?
A: Stretchy and warm.
Q: What is a non-woven fabric?
A: Fabric made by bonding, compressing or melting fibres together.
Q: What are the properties of non-woven fabrics?
A: Do not fray because they have no grain.
Q: What are the three fabric construction methods?
A: Woven, Knitted and Non-woven.
Memory Tip: WKN
Q: What is sustainability?
A: Meeting present needs without preventing future generations from meeting theirs.
Q: What is upcycling?
A: Turning waste materials into something better or more valuable.
Q: What is a single-use product?
A: A product designed to be used once and then disposed of.
Q: What is a finite resource?
A: A resource that will eventually run out.
Q: What is recycling?
A: Processing waste materials into new products.
Q: What are the 3 R’s?
A: Reduce, Reuse and Recycle.
Memory Tip: Use Less, Use Again, Make New.
Q: What does Reduce mean?
A: Use fewer resources.
Q: What does Reuse mean?
A: Use items again.
Q: What does Recycle mean?
A: Turn waste into new products.
Q: What are the four stages of a baked bean can’s lifecycle?
A: Extraction, Manufacture, Transport and Disposal.
Memory Tip: EMTD
Q: What environmental problems are caused by material extraction?
A: Deforestation and habitat loss.
Q: What environmental problem is caused by manufacture?
A: High CO₂ emissions.
Q: What environmental problem is caused by transportation?
A: Air pollution and CO₂ emissions.
Q: What environmental problem is caused by disposal?
A: Landfill waste and pollution.