This animation demonstrates various types of cones and pyramids.
An exercise about the generation of solids of revolution.
The masterpiece of Buddhist architecture is located in India.
Find views and nets of three-dimensional shapes.
Competing with each other in the 19th and 20th centuries, the world´s most powerful nations made great efforts to develop effective firearms.
Ancient Indians built huge, naturally ventilated storehouses.
This animation demonstrates the relative position of lines and planes.
Ancient Indian war elephants were used as ´tanks´ in battles.
This animation demonstrates the use of modern technology in agriculture.
Scipio’s Roman army defeated Hannibal’s Punic army in the battle fought during the 2nd Punic war in Africa.
Ancient Greeks became the ‘carters of the sea’ thanks to their advanced sailing ships.
An odourless, yellow, solid substance, the 16th most common in the Earth´s crust. One of the best known sulphur compounds is pyrite, also known as ´fool´s...
The simplest of the aromatic hydroxy compounds.
A colourless, viscous liquid, a highly corrosive, strong acid used in several industrial processes.
Colourless, odourless gas, the monomer of teflon.
The simplest primary amine.
A helical molecule consisting of alpha-D-glucose units. It is one of the basic components of starch.
Hypochlorite ions are formed when water is disinfected with chlorine.
The molecule has two enantiomers: stereoisomers that are mirror images of each other and are not superimposable.
Sulphur dioxide emission is the main cause of acid rains. It is an intermediate product in the production of sulphuric acid.