Across
- 4. a condition of the atmosphere in which the pressure is above average (e.g., in an anticyclone)
- 8. a period when all lights must be turned out or covered to prevent them being seen by the enemy during an air raid
- 9. cloud forming a towering mass with a flat base at fairly low altitude and often a flat top, as in thunderstorm
- 10. hot fluid material below or within the earth’s crust from which lava and other igneous rock is formed on cooling
- 11. an involuntary quivering movement
- 15. a mass of snow, ice, and rocks falling rapidly down a mountainside
- 18. pellets of frozen rain which fall in showers from cumulonimbus cloud
- 19. a luminous cloud or a halo surrounding a supernatural being or saint
Down
- 1. a swindler or a dishonest person
- 2. a column of air moving rapidly round and round in a cylindrical or funnel shape
- 3. a thick subsurface layer of soil that remains below freezing point throughout the year, occurring chiefly in polar regions
- 5. the process or eroding or being eroded by wind, water, or other natural agents
- 6. a system of winds rotating inwards to an area of low barometric pressure, with an anticlockwise (northern hemisphere) or clockwise (southern hemisphere) circulation
- 7. the SI unit of electromotive force, the difference of potential that would carry one ampere of current against one ohm resistance
- 12. a large-scale and violent event in the natural world
- 13. a very strong wind
- 14. relating to earthquakes or other vibrations or the earth and its crust
- 16. the criminal act of deliberately setting fire to property
- 17. a sudden strong rush of wind
- 20. an instrument measuring atmospheric pressure, used especially in forecasting the weather and determining altitude