Chemistry lessons
Water, states of matter, atom, molecule, chemical reaction, ion, combustion, metal ...

Electricity lessons
Electric circuit, current, conductor, insulator, Ohm's law, series and parallel circuit, circuit diagram ...

Mechanics lessons
motion, speed, trajectory, mass, weight, rotation, kinetic energy, Isaac Newton ...

Optics lessons
Light, laser, shadow, propagation of light, ray, converging and diverging lens, color ...

Chemistry

Water

• Water on Earth
• Changes of state in the nature: the water cycle
• Water in human body
• Test for water
• Properties of water in different states

States of matter

• States of matter and its changes
• Boiling water
• Water: freezing and melting
• Changes of state: mass and volume
• Molecules in different states of matter

Mixtures and solutions

• Heterogeneous mixtures
• Homogeneous mixtures
• Decantation
• Centrifugation
• Filtration
• Vaporization of water
• Distillation
• Chromatography
• Dissolving a solid in water
• Conservation of mass on dissolving
• Miscibility in water
• Molar concentration

Mass and volume

• Volume and its units
• Measuring volume with a graduated cylinder
• Mass and its units
• Measuring the mass of a liquid
• Mass of a liter of water
• Volumetric mass density
• Molar mass

Air and atmosphere

• Atmosphere
• Earth's atmosphere protect us
• Threats to the Earth's atmosphere
• Composition of air
• Air and life
• Pressure

Atoms and molecules

• Molecules
• Molecules in mixtures and pure substances
• Molecules and states of matter
• Atoms
• Composition of molecules
• Constituents of the atoms
• The electrical neutrality of the atom
• Electronic arrangement
• Molar mass

Combustions

• Basics of combustion
• The combustion of carbon
• The combustion of butane

Atoms and chemical reactions

• Chemical reactions
• Chemical equations
• Law of conservation of mass
• Chemical synthesis
• Predicting the spontaneous evolution of a chemical system
  

Metals

• Most common metals
• How to distinguish metals ?
• Corrosion of metals
• Electrical conductivity of solid materials
• Electrons and free electrons
• Electric current in metals

Ions

• The conductivity of aqueous solutions
• Aqueous solutions and ions
• The direction of movement of ions
• Formation of ions
• Tests for ions

Acidic and basic solutions

• pH of aqueous solutions
• Ions in acidic and basic solutions
• Dilution of acids and bases
• Composition of hydrochloric acid
• Chemical reaction between iron and hydrochloric acid

Electrochemical cells and chemical energy

• Chemical reaction beteween a copper sulphate solution and zinc
• Copper sulfate and zinc battery
• Basics of electrochemical cell

Electricity

Electrical components

• Two-terminal electronic components
• Basic electrical components
• Diodes
• What's a resistor ?
• How to determine a resistor value ?
• Resistors effects in circuits
• How to use a resistor ?
• Characteristic curve of a resistor

How to build simple circuits and draw diagrams

• How to build a basic electrical circuit
• How to draw diagrams of electric circuits

The electric current

• Conductors and insulators
• Direction of electric current in a circuit
• The dangers of electricity
• Current intensity - units
• how to measure current ?

The Voltage

• The voltage and its units
• How to measure a voltage ?
• Voltage in open and closed circuits
• Rated current and voltage for a lamp

Alternating voltage and current

• Alternating currents effects on led
• What are alternating current and voltage ?
• Periodic alternating voltage and its properties
• Oscilloscope
• Oscillogram
• Frequency
• Measuring RMS voltage with a voltmeter

Serie circuits

• What's a serie circuit ?
• Series circuit properties
• Short circuit in  series circuit
• Current law in series circuits
• Voltage law in series circuits

Parallel circuits

• What's a parallel circuit ?
• Some parallel circuits properties
• Short circuits in parallel circuits
• Nodes and branches in parallel circuits
• Current laws in parallel circuits
• Voltage laws in parallel circuits

Laws of electricity

• Ohm's law
• Current laws in series circuits
• Voltage laws in series circuits
• Current laws in parallel circuits
• Voltage laws in parallel circuits

Generating electricity

• Voltage for coil wires
• What is an alternator ?
• Alternating currents and voltages
• Generating electricity in power plants

Electric power and energy

• Electric power and power rating
• Electric power received by an electrical device
• Electric power consumption by an electrical device
• Relationship between Electric power and energy

Light sources

• Types of light sources
• Why can we see objects ?

Propagation of light

• Rectilinear propagation of light
• beams of light
• Speed of light
• Light and distances

Shadows, lunar eclipses and phases of the moon

• Formation of shadows
• The Moon and eclipses

Colored lights - color of objects

• Decomposition of white light
• Colored lights
• Color of objects

Image formation - Thin lenses

• Thin converging and diverging lenses
• Image formation by thin lenses
• Vision and eyes

Gravity

• The solar system - motions of celestial bodies
• Physical interactions
• Effects of gravity
• Weight of an object
• Difference between weight and mass
• Relationship between weight and mass
• Gravitational acceleration

Energy

• Energy basics
• Potential energy
• Kinetic energy
• Mechanical energy
• Translational Kinetic Energy
• kinetic energy mass and speed