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Across 5. a line of mountains 6. a stretch of land 8. very rich soil, good for agriculture 9. a large, bowl-shaped area of land, low in the centre and high on the edges 14. a period of time when the temperature drops, with an expansion of ice sheets and glaciers on the land 15. the bottom of a river

Down 1. a large, U-shaped area of rocky land in northern Canada 2. a large area of grasslands; also called prairies 3. a river or stream falling from very high 4. an area of land surrounded on three sides by water 7. a large body of water between continents 10. the point where a body of water meets the land 11. a slowly moving mass of ice near the north and south poles 12. the low area between mountains 13. an area of high level ground