Across
- 1. the central part of an atom
- 7. the rate at which the speed of an object increases
- 9. relating to the energy produced by splitting atoms
- 13. the force/power that makes smth turn around a central point
- 14. a change that is caused by an event, action etc
- 15. forming a 90° angle with another surface or line
- 17. a very small, fast, and continuous shaking movement
- 19. to put force or physical pressure on something
- 20. the part an atom that has a positive electrical charge
Down
- 2. a statement in maths that two amounts/totals are equal
- 3. an amount of something that can be counted or measured
- 4. a quantity which can represent several different amounts
- 5. a part of an atom that has a negative electrical charge
- 6. decided or arranged without any reason or plan
- 8. a feature of a thing, substance, place etc
- 10. a substance through which a force travels
- 11. the force or weight that is being put on to something
- 12. a special way of doing something
- 16. a relationship between the sizes of two numbers or amounts
- 18. a part of an atom that has no electrical charge