Across
- 4. - It can be measured in litres or cubic meters.
- 6. - Perfume spreads in a room due to this process.
- 8. - Substance that makes up everything around us.
- 12. - Puddles disappear on a sunny day due to this process.
- 13. - Lead has a higher value of this compared to wood.
- 15. - Dry ice undergoes this process.
- 16. - What happens to the air in a bicycle pump.
- 17. - Air and oxygen are examples.
- 19. - The sun provides this in the form of heat and light.
- 20. - The theory that explains the behaviour of matter based on particle motion.
Down
- 1. - Steam is an example of water in this form.
- 2. - The combining of hydrogen atoms to form helium in stars.
- 3. - Ice and rock are examples of this state.
- 5. - Atoms and molecules are examples of these.
- 7. - Water turns into ice during this process.
- 9. - What happens when you heat water to 100 degrees Celsius.
- 10. - Water droplets form on a cold glass in this process.
- 11. - Measured in units like pascals or atmospheres.
- 14. - Ice undergoes this process when heated.
- 18. - Water is the most common example.