Free chemistry and physics lessons

Learning physics and chemistry easily and freely - Science for elementary school, middle school and high school

This free website will help you to enrich your learning in science. It provides free science online ressources for kids, students, beginners, parents looking for homeworks help and everyone curious about physics and chemistry. It can be useful for self studying, to review lessons, to prepare for science exams, for learning scientific basis and even for school projects.All learners can access without restriction to science lessons in various fields such as chemistry, electricity, optics or mechanics written with scientific rigor. Most of these lessons, written with simple words, include basics notions making them understandable by everyone.


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 class



States of matter

Mixtures and solutions

Mass and volume

Air and atmosphere

Atoms and molecules


Atoms and chemical reactions



Acidic and basic solutions

Electrochemical cells and chemical energy


electricity class


Electrical components

How to build simple circuits and draw diagrams

The electric current

The Voltage

Alternating voltage and current

Serie circuits

Parallel circuits

Laws of electricity

Generating electricity

Electric power and energy

optics class


Light sources

Propagation of light

Shadows, lunar eclipses and phases of the moon

Colored lights - color of objects

Image formation - Thin lenses

mechanics class




©2021 Physics and chemistry