Acetaldehyde (ethanal) (CH₃CHO)

An aldehyde which is an important raw material and intermediate product in industry.

Pyridine (C₅H₅N)

A basic heterocyclic organic compound; a colourless, pungent toxic liquid.

Types of farms and villages

The structure and density of farms and villages depend on the geographical features of the region.

Styrene (vinyl benzene) (C₈H₈)

A colourless liquid with an odour similar to benzene. The monomer of polystyrene.

Hydrogen-iodide (HI)

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

Life on the farm (Hungary)

Farming consists of special agricultural activities.

Napoleon´s soldier (19th century)

Napoleon Bonaparte´s Grande Armée was considered invincible.

Sulphur trioxide (SO₃)

One of the oxides of sulphur, forms sulphuric acid with water.

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.

Eurasian Avars (8th century)

The Avars established a stable empire in the Carpathian Basin between the 6th-8th centuries.

Copper sulphate (CuSO₄)

A compound of sulphur often used as a pesticide.

Historical topography (battles, Hungarian history)

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

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