Across
- 3. tough outer part of earth
- 6. sun reaches most north and south excursion
- 8. boundary making earth less dense
- 10. thick layer of silicate rock
- 11. ferromagnetic transition metal
- 13. circular movement of object around axis
- 14. sun crosses celestial equator
- 16. marks first day of summer
Down
- 1. daytime starts becoming longer
- 2. imaginary line drawn around earth
- 4. speed object needs break celestial gravity
- 5. orbital motion of one body around another
- 7. successive meridian transits of the sun
- 9. thick layer of molten iron and nickel
- 12. time between two consecutive transits
- 15. curved path an object takes due to gravity