Across
- 3. / The style or method used to build something. recycle / convert in to reusable material
- 6. / add something to it that was not there when made . renewable energy / A natural occurring source of energy. heat island / an urban area that is warmer than its surroundings
- 7. / Able to be maintained at a certain rate or level
- 8. / to bring waste land under cultivation
- 11. solar / Use of sun’s energy for heating and cooling
- 12. cycle / The process in which water circulates
Down
- 1. mass / The ability of a material to absorb and store heat
- 2. / Capable of being decomposed by bacteria or other materials
- 4. transfer / The process of thermal energy being moved from one object to another
- 5. roof / A building that is partially or completely covered by vegetation
- 9. / Allows concrete to achieve certain needs
- 10. earth / A mixture of clay, sand, and soil to make formwork