Science class online
Chemistry and physics lessons
atom physics lesson


chemistry high school


Free online mechanics lessons for elementary school, middle school and high school.
Take advantage of scientific resources that can be used freely to discover mechanics, the science of motions and interactions


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