STAGE 2: Natural & Processed Materials

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Across
  1. 3. an adjective that means long lasting
  2. 8. able to take in and hold water
  3. 11. these sort of cars don't use petrol
  4. 12. to make a guess
  5. 14. energy produced by the sun
  6. 15. able to be seen through
  7. 18. safe from water
  8. 19. stretchiness of a material
Down
  1. 1. this product comes from sheep
  2. 2. provides good grip on a skateboard
  3. 4. one of the properties of cotton
  4. 5. materials found naturally in the world
  5. 6. a natural product found in some rocks
  6. 7. a most important natural product
  7. 9. tyres are made from this natural product
  8. 10. measurement of how tall something is
  9. 12. materials manufacture in a factory
  10. 13. this metal enabled early man to make spears
  11. 14. a natural product used to make glass and cement
  12. 16. this material takes a long time to decompose
  13. 17. this natural product is used to make electricity