Building cubes shown in several views from the available unit cubes aids spatial vision and other skills.
Senators, being members of the highest social class of ancient Rome, wore togas with purple edges.
The equipment of ancient Chinese soldiers was rudimentary.
Wolfgang von Kempelen´s best known invention.
This animation demonstrates how radios work.
The devastating defeat in the battle against the Ottomans marked the end of an era in Hungarian history.
Water on Earth is in a continuous state of change. The water cycle includes processes such as evaporation, precipitation, melting and freezing.
Examining solids formed by the intersection of a cube and a plane.
A colourless, odourless gas, an important component of the atmosphere, indispensable to sustain terrestrial life.
Colourless, odourless, heavier-than-air gas. Necessary for the photosynthesis of plants.
Colourless, odourless gas, highly toxic to humans and animals in high concentration.
A colourless, odourless, non-reactive gas, it constitutes 78.1% of Earth´s atmosphere.