Across
- 2. the separation of light into different colours
- 6. the curved path that an object follows after it has been thrown or shot into the air
- 9. a unit used for measuring length, approximately equal to 2.54 centimetres
- 10. to break, or to break something, into smaller parts
- 13. to send back light, heat, energy, or sound from a surface
- 14. causing, caused by, or connected with light or sound changing direction or separating
- 16. to (cause to) move far apart in different directions
- 17. a hard, transparent material, used to make windows, bottles, and other objects
- 19. to make light waves move in one direction only, or mainly in one direction
- 20. a small, round spot, mark
- 21. the central point, position, or part
- 24. any picture, especially one formed by a mirror or a lens
- 27. for that reason
- 28. a small drop of a liquid
- 31. to watch carefully the way something happens
- 32. having the shape of a sphere rounded
- 34. the movement of something turning round quickly
- 35. the smallest pieces of matter that make up atoms or the parts of atoms
- 36. the quality of being white
- 39. the brightness that comes from the sun, fire, etc. and from electrical devices
- 41. the symbol for a number or an amount expressed in numbers
- 42. a solid shape with a round base that narrows to a point at the top
- 43. in every part, or during the whole period of
- 44. continuing in one direction without bending or curving
- 45. the process by which a substance or object takes in a liquid, gas, waves, or chemical and makes it a part of itself
- 47. a structure, consisting of a curved top on two supports
- 49. considered on its own and separate from other things
- 51. an arch (= curved shape) of different colours seen in the sky when rain is falling and the sun is shining
- 52. to move slowly, a line or border at which a surface ends
Down
- 1. to change direction or to separate when something travels through a substance
- 3. the light that comes from the sun
- 4. the fact of light or sound being caused to change direction
- 5. to send something through the air with force
- 7. transparent glass or plastic object that separates white light that passes through it into different colours
- 8. the simplest unit of a chemical substance, usually a group of two or more atoms
- 11. the quality of being bright from reflected light on the surface
- 12. relating to, or characterized by a colour or colours
- 15. to see something or someone, or to notice something
- 18. having a particular shape
- 22. from one side or end to the other, from one part to another
- 23. the image of something in a mirror or on any reflective surface
- 25. a line of light (particles) flowing in one direction
- 26. the distance that can be travelled
- 29. The particular physical form or appearance of something
- 30. a long, thin line of something such as light or smoke
- 33. a piece of glass or plastic having a curved surface in order to change the images to make them larger, or smaller
- 34. a thin piece of wood or other material
- 37. a range of waves such as light waves or radio waves
- 38. a small electric light you can carry in your hand
- 40. an empty space or opening in an object
- 46. the quality of having parts on either side or half that match each other
- 47. the space between two lines or surfaces at the point at which they touch each other
- 48. move away over a large area, or to cause this to happen
- 50. in the direction of