Across
- 3. The transfer of heat energy by vibrations from one atom to another
- 4. Focuses or disperses a light beam by means of refraction
- 6. The transfer of heat by electromagnetic radiation
- 7. Light rays coming together to meet at a common point
- 9. Energy when an atom is split
- 11. Transferring signals from the retina at the back of the eye to the brain
- 14. When heated molecules gain more energy & move faster. This leads to more collisions and the particles moving further apart
- 17. The angle of incidence is equal to the angle of reflection.
- 18. A mirror that is curved inwards
- 19. Is the total energy
- 22. The light ray that strikes a reflective surface
- 23. Stored energy
- 25. The gap in the iris through which light centres the eye
- 27. The angle at which incoming light rays approaches a surface.
- 28. Energy stored in food and in a battery
- 31. To control the amount of light entering the pupil
- 33. The units for energy
- 35. A line perpendicular to the surface.
- 36. When cooled molecules lose energy & slow down. This leads to less collisions and the particles move closer together.
Down
- 1. Energy cannot be created or destroyed only transformed
- 2. Materials that conduct heat well
- 5. Energy of an object being held above the ground
- 8. The angle between the reflected ray and the normal
- 10. A scale of temperature
- 12. A mirror that is curved outwards
- 13. Energy is a stretched or compressed spring
- 15. The bending of light as it passes from one transparent object to another
- 16. Is the measure of the average kinetic energy of the particles
- 20. Outgoing ray
- 21. Energy of a vibrating speaker
- 24. The energy of a moving object
- 26. Light rays that are spreading out
- 29. The substance a light wave travels through
- 30. Energy is transferred by mass motion
- 32. The back of the eye with light sensitive cells
- 34. The transparent front part of the eye