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