1. When the energy is released in the form of heat and light, it is:
2. Man’s first experience of fire could be:
3. When carbon and hydrogen are combined with oxygen, they:
4. The temperature at which every fuel bums is called:
5. Fire can be:
6. Fire brigade is:
7. The fuels available in natural form are:
8. Fire is our
9. Fire is a bad master if it is
10. Early man might have experienced fire by