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The indian lotus

In the ancient Eastern religions it is the symbol of rebirth. Besides its aesthetically pleasing appearance, all of its parts are edible.

The infrared eye

Is an everyday video camera able to detect frequencies invisible to the human eye?

Boiling at room temperature

Water boils at 100 degrees Celsius. But is it possible to boil water at room temperature?

Grass snake

A species of snake widespread in Europe and Asia.

Fehling's test

If we add formaldehyde to the Fehling’s reagent, copper metal can form with a bit of luck.

The silver mirror test

If we add formaldehyde to the Tollen’s reagent and heat it, the silver ions reduce to elemental silver.

Mediterranean climate

It is characterised by dry, hot summers and mild winters.

Flower indicator

Purple and wine red flowers can be used as pH indicators.

Gothic architecture

Gothic art is one of the most important styles of the Middle Ages.

The United Nations

The largest international organization of the world; it includes every country of the Earth. Its main objective is to keep peace.

Glowing heart

We burn a heart in a piece of paper with the help of oxygen produced upon the decomposition of the potassium nitrate solution.


Meteora is one most important complexes of Eastern Orthodox monasteries in Greece.

Great egret

Long-legged, large white bird with a characteristic S-shaped neck, living in wetlands.

Plitvice lakes

Croatia’s stunning system of lakes is included on the list of World Heritage Cultural Sites.

Nature reserve

Nature reserves are highly protected areas. Their regulation is less strict than those of national parks, but environmental protection is a must here, too.

Snow line

Above a certain altitude snow does not melt, not even in summer.

Sea of stones

Sea of stone are covered with hardly any soil; the area is usually unsuitable for agricultural purposes. Stones that can be found here were once used as...

Model volcano

The reaction of baking soda and vinegar tinted with red food colouring resembles a volcanic reaction.

The process of physical and chemical weathering

Upon physical weathering the rock only falls into pieces, whereas during chemical weathering its chemical structure changes too.

The lion

King of the savannahs, the lion is at top of its food chain. Its only enemy is man.

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