Sulphur (S₈)

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...

Clothing (Western Europe, 19th century)

Clothing reflects the lifestyle and culture of the region's inhabitants.

Historical topography (battles, Hungarian history)

Place the sites of notable battles in Hungarian history on a blank map.

Soviet soldier (World War II)

The Soviet army became a very powerful power broker after WWI, at first due to its size, later due to its arsenal.

Hungarian army in the 15th century (infantry)

One of the main units of Matthias Corvinus´ Black Army was the infantry.

Hungarian hussar

The term ´hussar´ refers to a type of light cavalry which originated in Hungary and was the most popular in the 18th-19th centuries.

Views

Pick the shape that is shown in different views below.

Net of a cube (exercises)

Not all nets consisting of 6 congruent squares are foldable into cubes.

Cuboid (exercises)

Edges, diagonals and faces of a cuboid can be identified by its vertices.

Volume of spheres (demonstration)

The sum of the volume of the ´tetrahedrons´ gives an approximation of the volume of the sphere.

Ozone (O₃)

An allotrope of oxygen, consisting of 3 oxygen atoms.

Hydrogen-iodide (HI)

A colourless, heavier-than-air gas with a pungent odour.

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