Materials This is a question and answer based on Materials. 0.0 / 5 ? Design & Technology: Resistant MaterialsMaterialsResistant MaterialsDesign & TechnologyGCSEEdexcel Created by: Sanjidah99Created on: 14-08-13 14:32 Why are hardwood timbers so called? Hardwood timbers get their name because of their cell structure 1 of 10 Where do softwood timbers come from? Softwood timbers come from coniferous trees which are evergreen, needle-leaved, cone-bearing trees such as fir and pine 2 of 10 What do ferrous metals contain? Ferrous metals contain iron 3 of 10 What do we call a mixture of two or more metals, or elements such as carbon? A mixture of two or more metals, or elements such as carbon, is called an alloy 4 of 10 How many times can thermoplastics be heated and shaped? Thermoplastics can be heated and shaped many times, while thermoset plastics can only be heated and shaped once 5 of 10 What are composite materials made of? A composite material is a combination of a reinforcing materials and a suitable bonding agent 6 of 10 What are smart materials? Smart materials react to a stimulus, such as temperature or moisture 7 of 10 Which of the following reacts to changes in light levels? Photochromic pigments react to changes in light levels 8 of 10 If a material can permanently deform in all directions without cracking, it is: If a material can permanently deform in all directions without cracking, it is malleable 9 of 10 If a material can withstand sudden blows or shocks without breaking, it is: If a material can withstand sudden blows or shocks without breaking, it is tough 10 of 10
Comments
No comments have yet been made