Across
- 2. a living organism
- 3. a coloumn of air that spins fast and rips things out of the ground
- 6. a shortage of water due to long periods of low rainfall
- 8. where two or more things rely on each other to survive
- 10. you can sit around it at a campsite at night to keep warm
Down
- 1. not derived from living organisms
- 4. a series of organisms each dependent on the next as a source of food.
- 5. also known as co2
- 7. an overflow of a large amount of water beyond its normal limits, especially over what is normally dry land.
- 9. there are four of them throughout the year