The first indoor theatre in modern history to be constructed according to the theatre-building codes of Antiquity was inaugurated in 1585.
The cathedral named after the Assumption of Mary into Heaven is one of the gems of French Gothic architecture.
Polymerised ethylene is known as polyethylene, a type of plastic.
During freezing hydrogen bonds are formed between water molecules resulting in a crystal structure.
Knallgas is the mixture of hydrogen and oxygen. It will explode when ignited.
Neptune is the outermost planet of the Solar System, the smallest of the giant planets
The large white butterfly is a common species of butterflies, through which we demonstrate the anatomy of butterflies.
In alkaline batteries electric current is generated by electrochemical reactions
DC motors consist of a permanent magnet and a coil within the magnet, with electric current flowing in it.
An important endocrine gland producing hormones that affect metabolism and the calcium balance of the body.
A sphere is the set of points which are all within the same distance from a given point in space.
This animation demonstrates various types of cylindrical solids as well as their lateral surfaces.
This animation demonstrates the components (vertices, edges, diagonals and faces) of the cube, one of the Platonic solids.
An exercise about the regular hexahedron built from unit cubes to help deepen your knowledge of cubes.
The solution of hydrogen chloride in water is called hydrochloric acid.
An entertaining game about different views of spatial objects.
A cuboid is a polyhedron with six rectangular faces.
Addition is a reaction in which the molecules of two or more substances unite without the formation of a by-product.
Large-scale ammonia production requires high temperature and pressure and the presence of iron as a catalyst.
Ammonium chloride is the result of the reaction of ammonia and hydrogen chloride