There are 4 main universal forces: electromagnetic, strong nuclear, weak nuclear, and gravitational. The electromagnetic force acts on charged particles like protons and electrons and is responsible for electric and magnetic forces. The strong nuclear force binds protons and neutrons together in the nucleus. The weak nuclear force is involved in nuclear decay. The gravitational force acts between all masses and is responsible for keeping planets, stars, and galaxies in orbit.

1. UNIVERSAL FORCES part I 4 Universal Forces: 1)Electromagnetic 2)Strong Nuclear 3)Weak Nuclear 4)Gravitational

9. UNIVERSAL FORCES part 2 Gravitational Force

14. Tides in the Ocean Watch the tide change with the phase of the moon!!