1) How can we classify materials according to their properties? a) Natural or processed materials b) Natural or artificial materials c) Natural or raw materials d) Processed or raw materials e) Artificial or raw materials 2) Which are the raw materials? a) Those in natural state b) Those processed my humans c) Those that come from Jupiter d) Those that have been refined 3) Which are the processed materials? a) Those which are from nature b) Those which are from Jupiter c) Those which have been refined d) Those that we want to be  e) Those that have been built by humans 4) The 3 properties of materials a) Physical, Natural, Recyclabe b) Physical, Chemical, Ecological c) Physical, Chemical, Reusable d) Physical, Ecological, Natural 5) Which one is not an ecological properties? a) Recyclabe b) Oxidation c) Toxic d) Biodegradable 6) Which is a chemical property? a) Oxidation b) Reuse c) Recyclabe d) Hardness e) Toughness 7) Which is not a physical property? a) Hardness b) Toughness c) Optical d) Raw e) Electrical 8) Which is a good thermal conductivity? a) Plastic b) Metal c) Paper d) Cardboard 9) Which is good electrical conductivity? a) Wood b) Paper c) Steel d) Glass 10) Is cardboard a Recyclabe material? a) Yes b) No

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