Contents.

Matter and Molecules.

• Measurements
• Density
• Weight and stretching
• Molecules
•  

 Forces and pressure.

• Moments and levers
• Centres of gravity
• Adding forces
• Energy transfer
• Pressure in liquids
• Floating, sinking and flying
• Fluid flow

Motion and energy

• Velocity and acceleration
• Graphs and equations
• Fallig bodies
• Newton´s laws motion
• Momentum
• Kinetics and potencial energy
• Circular motion

Light and sight

• Light rays 
• Reflection of light
• Plane mirrors
• Curved mirros
• Refraction of light
• Total internal reflection
• Lenses
• Ligth waves
• Sound waves
• Musical notes.