1. Four Fundamental Forces

2. Strong Force
Holds atomic nuclei together
Protons have a positive charge, so they repel each other  Strong force holds them together

3. Weak Force Particle decay Ex: Nuclear fusion (sun shining)
Liquid outer core (radioactive decay)
Volcanoes
Earthquakes
Plate tectonics

4. Electromagnetism Works with charges (+ or -) Static and magnets
Repel each other: + & +, - & -
Attract: + & -
Ex:
Light, Radio/TV
Lightening
Friction, Balloon sticking
Formation of Solar System
Earth’s Magnetic Field

5. Gravitational Newton Einstein
Everything in universe that has mass attracts to everything else that has mass
Depends on distance
Objects that have mass/energy distort space time (fabric)
Gravity can bend light (energy) if object has enough mass

6. Give me an example for each type of force within the classroom.
Summary
Give me an example for each type of force within the classroom.
Strong
Weak
Electromagnetism
Gravitational

7. Four Forces Foldable P. 20 On outside flap: Under flap:
Picture
Under flap:
2-3 facts about force
Inside foldable:
Type of force