Across
- 4. - most common fuel used in homes.
- 5. - most common fire extinguisher
- 7. -substances those which don’t burn.
- 8. - Flame is a region where the burning or combustion of gaseous substances take place.
- 11. - A type of combustion in which the substance suddenly catches fire without the supply of heat or friction externally
- 12. - The substances which have very low ignition temperature and can easily catch fire
Down
- 1. temperature - The lowest temperature at which a fuel catches fire
- 2. - The amount of heat produced on burning one kilogram of fuel completely
- 3. the cutting down of trees on a large scale
- 6. - fuel for our body
- 9. - An increase in the average temperature of the earth’s atmosphere, especially a sustained increase that causes climatic changes
- 10. - colour of an LPG flame