Plastics

1234567891011
Across
  1. 2. The fraction from crude oil that is commonly cracked to make monomers for plastics
  2. 5. The main raw material for most plastics (a fossil fuel
  3. 6. A tall tower used in oil refineries to separate fractions
  4. 8. 7. The process of pumping crude oil from under the ground or sea
  5. 9. 5. Place where crude oil is separated into useful fractions
  6. 10. The chemical reaction that joins monomers into a polymer
  7. 11. 4. Type of plastic that softens when heated and can be reshaped
Down
  1. 1. A substance that speeds up polymerisation without being used up
  2. 3. Small molecules that join together to make plastics
  3. 4. Long chains of repeating units that make up plastics
  4. 5. The process of breaking large molecules into smaller ones using heat
  5. 7. 6. Type of plastic that sets hard permanently when heated and cannot be reshaped