Across
- 4. Something exchanged for goods and services
- 7. The 'Great Southern Land'
- 8. The process of making water drinkable for people
- 9. animals which are bred for human consumption
- 11. There are 8 of these spheres orbiting in space in our solar system.
Down
- 1. A disease which spreads through dirty water
- 2. The process of making water unusable through chemicals, industry or waste.
- 3. a system of farming which involves breeding plants or fish in water environments.
- 5. A person who studies a particular field and becomes an expert.
- 6. The long term average weather patterns
- 10. Plants which are grown to provide food for humans