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