Across
- 4. this means finding another purpose for materials that have already been used
- 7. this means using less of a certain material and using alternatives
- 12. this means producing a new product out of discarded materials
- 13. Matter is composed of ______
- 14. the ability of gas molecules to spread out faster
- 16. liquid minus heat equals solid
- 18. the complete reverse of deposition; solid to gas
- 21. refers to the change in the phases but no new product formed
- 23. materials do not rot easily
- 24. the ability of liquid to flow
- 25. the ability of a material to hold liquid to a certain extent
Down
- 1. the amount of space occupied by an object
- 2. the amount of matter in an object
- 3. the ability of a material to reflect light
- 4. this is caused by the reaction of iron with oxygen present in the air
- 5. in evaporation, liquid + heat is equal to _____
- 6. Complete: Materials __________ Facility
- 8. the complete change in the identity of matter
- 9. the ability of a material to burn
- 10. A molecule is composed of a group of ______
- 11. the amount of matter present in a given volume of substance
- 15. it is defined as anything that has mass and volume
- 17. materials that can be decomposed by bacteria or other living things
- 19. solid + heat = liquid
- 20. a serious problem we facing nowadays which the Earth receives greater amount of carbon dioxide in the atmosphere, the greater the heat trapped in planet
- 22. property of solid to be hammered into sheets