Across
- 1. a spring that throws a jet of hot water or steam into the air
- 2. a high, rock-covered flatland in the Sahara
- 6. a measure of the amount of energy in food
- 7. a very large ecosystem such as a desert, forest, wetlands,or grasslands
- 8. unable to read or write
- 9. a type of brick that is made of clay mixed with straw and dried in the sun
- 13. the movement of water from Earth's surface into the soil
- 15. one half of a sphere
- 17. all the plant life in a particular region
Down
- 1. a large mass of ice found near Earth's poles
- 3. the process of adjusting to lower oxygen level sat high elevation
- 4. a system in which a country rules another area as a colony
- 5. a group of territories, people's, and or nations ruled by a single authority
- 10. a sever shortage of food that results in wide-spread hunger
- 11. a version of a language that is spoken in a certain region
- 12. to conduct a trade by exchanging goods and services instead of money
- 14. a geographic region in which there is to little rainfall
- 16. a community of all living things inan area and the environment in which they live in