Across
- 1. Astronomical unit
- 4. G constant.
- 6. Amount of substance
- 7. Movement of a planet around the Sun.
- 10. International system of units
- 14. Force from the Earth to each body on its surface
- 16. Path of the Sun.
- 18. Responsible for the change of the north star every 26000 years.
- 19. Motion of the Earth on its axis.
- 20. Change of the position over time
Down
- 1. Change of the velocity over time.
- 2. Amount of matter measured on kilograms
- 3. Unit to measure the light intensity in the metric system.
- 5. Unit to measure current in International system.
- 8. Current I in international system
- 9. Dimension, [L]
- 11. Temperature unit in the international system
- 12. Time unit in the metric system.
- 13. Shape of the Earth's trajectory around the Sun.
- 15. Force of attraction between masses.
- 17. Tilt Earth axis, 23.74 degrees.