keywords

Across

1. the way a surface or material feels when you touch it
5. something you decide based on the results of your investigation
8. easily breaks or shatters into pieces when dropped, hit or bent
10. a metal coated by another metal
13. to look at what you have done and think of how to do it better next time
14. the reddish-brown layer formed when iron combines with air and water
16. something that will last for a long time
17. the process of making something by crossing strips or threads under and over each other
20. when we test everything in the same way and only have one variable factor
21. a metal breaking down
22. using thread to sew or join two materials together
23. a thick mixture of a solid and a liquid
26. objects made from clay or sand
30. a liquid used to give colour or texture or protect surfaces and objects
31. a white powder that quickly becomes a hard solid when mixed with water
33. to roll material into a spiral shape
34. a type of rock that contains minerals and metals
37. will not let water pass through
39. qualities or characteristics of matter and materials
45. to mix, add or join together
46. things that play a role in a result
47. a material that is not easily damaged by fire
49. able to be beaten or hammered into shapes
50. far from big, modern cities where people live oﬀ what is available in nature
52. strengthened with additional material
53. how easily a material bends
54. does not absorb water, but water can seep through small holes
55. something new and useful coming out of a process

Down

2. process of reusing old material to make new objects
3. to twist three strands over and under each other to form one thicker strand
4. a dry, coloured powder that is mixed with oil or water and added to paint to give paint its colour
6. making something look attractive
7. carries heat or electricity
9. a good guess about what you think will happen in the investigation
11. framework for support
12. a material that is not easily damaged by heat
15. attracted to a magnet
18. the list of raw materials that are selected to go into the mixture
19. something that is made by mixing things together
24. a furnace or oven that is used to process materials by burning, baking or drying them
25. a mixture of sand, gravel, cement and water
27. pulled towards
28. plastics, rubber and certain fabrics
29. materials that have been changed in some way to get new properties
32. two or more metals mixed together, or a metal mixed with a non-metal
35. facts or information collected in the investigation
36. where products are made by machines on a large scale
38. changed in diﬀerent ways to get new materials or products with new properties
40. able to be drawn into wires
41. mixes completely with water
42. factors that can aﬀect the result in an investigation
43. a product made from clay and limestone that becomes hard when mixed with water
44. material made from yarn or fibres by weaving or knitting
48. able to take in or soak up liquids easily
51. when a shiny metal gets a dull appearance