Across
- 6. a layer of gas above the earth's surface that protects human beings from harmful rays of the sun
- 8. the essential materials needed in an industry to make a product
- 12. in the language of colonialism, the colonizing power was often referred to as the “mother” country-a sexist reference no longer in use
- 13. to feed on growing plants such as grass
- 14. a complete change in something
- 15. worldwide
Down
- 1. land held to be used by everyone
- 2. an increase in the world's temperature
- 3. animal droppings used for fertilization
- 4. a group of animals distinguished by particular characteristics
- 5. to use
- 7. to sow seeds by throwing them over a field by hand
- 9. an economy based in industry, not agriculture
- 10. animal food
- 11. new inventions; the science industry