Across
- 5. A light beam ___ in a straight line.
- 6. What's the colour of water?
- 9. The unit of pressure is ___.
- 11. Give the speed of light in a vacuum.
Down
- 1. The ___ is the minimum distance in which an eye can focus on an object.
- 2. Magnetic domains are areas where the ___ magnets show to the same direction.
- 3. 2 ___ colours mixed becomes white light.
- 4. A ___ is a physical property where directions are important.
- 7. An electron is the ___ known negative charge.
- 8. The size of an atom is 0,1___.
- 10. Pressure is the amount of ___ exerted in an area.
- 12. The actions of a force are: change of shape, velocity and ___.
- 13. Every action has an equal and ____ reaction.
- 14. The molecules of a ___ are packed together.
- 15. What does a magnifying glass look like?