Across
- 4. a chemical salt used to make fertilizer
- 5. small particles of rich soil good for farming
- 7. an underground layer of rock through which water flows
Down
- 1. a person who lives by moving from place to place in search of food
- 2. a dry riverbed that fills with water when rare rains fall in a desert
- 3. an area where sand, silt, clay or gravel is dropped at the mouth of a river.
- 6. a large area of sand