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