Across
- 2. Sound cannot travel through a
- 3. The louder a sound is the more energy the ___________(2)carry
- 4. travels from a hotter region to a colder region
- 6. uses turbines to generate electricity
- 7. Sound travels slower than _________
- 8. Fossil fuels are formed from _________(2)that were buried millions of years ago
- 9. is the most useful form of energy because it can be converted into other forms
Down
- 1. In Singapore we cannot see cables along the streets because they are
- 2. Sound energy is generated by ___________(2)
- 5. Unwanted heat produced by electrical devices reduces _______