Across
- 4. term used to denote colours of the rainbow
- 5. mirror used as a shaving mirror
- 10. blanket of air by which Earth is surrounded
- 12. __________ in the path of light causes shadow
- 13. irregular reflection
Down
- 1. rear view mirror in vehicles
- 2. lens thick in the middle and thin in the edges
- 3. instrument to detect direction of wind
- 6. disasters caused by nature are called natural __________
- 7. the band of seven colours
- 8. instrument to measure speed of wind
- 9. a violent funnel-shaped thunderstorm
- 11. powerful circular storm over low pressure area