Physics

2. The seventh planet from the Earth
4. The ursa that resembling a small bucket
5. The force resulting from the force of attraction and weight
6. The name of planet and chocolate
10. The ion can have the positive electrical charge and ...
12. Founder of physics, a student of Plato
14. Earth satellite
17. The force produced by the motion of the one thing on the surface of another thing
18. The second planet from the Earth

1. The fifth planet from the Earth
3. Figures created by stars
7. Name of the physic who had the Nobel Prize for the theory of the photoelectric effect
8. The star of solar system
9. The bond that resulting from the interaction of the
11. Physics section that learning the the motion of bodies
12. The smallest part of a chemical element
13. The creater of color theory
15. Science studies the laws of nature
16. The elementary particle that involved in thermonuclear reactions