Properties of MaterialsVersión en línea True or False Questions about the properties of materials por tekno TEKNESO 1 Metal can oxidise but cardboard cannot a True b False 2 The chemical properties of materials are observed while under external stimuli such as light , electricity, heat, applied forces. a True b False 3 Wood is denser than stones so that why it floats a True b False 4 Renewable materials exits in nature in unlimited amounts a True b False 5 The opposite property to brittleness is toughness a True b False 6 If a material has little density means that it’s very porous a True b False 7 The steel structures of old buildings are reddish-brown because they contain copper a True b False 8 A hard material can be brittle a True b False 9 Metals are excellent thermal conductors a True b False 10 Ecological properties are related to the impact that materials have on the environment a True b False 11 Plasticine is an elastic material a True b False 12 Porous materials have a higher density a True b False 13 Organic materials take the longest to decompose a True b False 14 Translucent materials allow to pass through but you can’t see clearly what is behind them a True b False 15 Weldability is the ease with which a material can be melted a True b False 16 Plasticity allows the material to return to (recover) its original shape and size when the force is removed a True b False 17 Tough materials are those that can resist hits that tends to break them. a True b False 18 Rust is another name for oxidised iron a True b False 19 Malleability is the property of some materials that allows them to be made into cables or filaments a True b False 20 Plastics are good electric conductors a True b False 21 Gold oxidises easily a True b False 22 To find out if a material is a thermal conductor, when you touch it, it becomes cold a True b False 23 A brick is a plastic derivative a True b False 24 Thermal expansion is the increase in the size of a material when its temperature goes up. a True b False 25 Wood is a material sensitive to thermal expansion a True b False Feedback 1 Cardboard means 'Cartón' 2 These properties are related to physical properties. 3 Wood is less dense than stones 4 Renewable means 'Renovable' 5 Brittleness means 'Fragilidad' 6 If a material has little density is because of it weights very little in relation to its volume. 7 Not reddish-brown old buildings means that they all contain copper 8 For instance glass 9 Metals allow the heat pass throughout them 10 Ecology is related to the environment 11 False it is plastic 12 Porous means to have holes with air inside 13 The other way round 15 To weld means 'Soldar' and To melt means 'Fundir' 16 The other way round 18 Rust is the result of oxidation 20 Plastics are good electric insulators 22 It becomes warm 23 Brick means 'ladrillo'
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