Cysteine

An amino acid containing sulphur, one of the amino acids that make up proteins.

Valine

One of the 20 amino acids that make up proteins.

Karst region (basic)

Karst formations include dolines and dripstones.

Glacier (basic)

A glacier is a large body of ice that forms from snow, and is in constant, slow motion.

Football stadium

Football is one of the most popular team sports due to its relatively low equipment requirements and simple set of rules.

Handball stadium

Handball is one of the most popular team sports.

Iodine crystal

A solid, grey substance which sublimates when heated. Its solution in alcohol is called ´tincture of iodine´, it is a disinfectant.

Dimethyl ether (C₂H₆O)

A colourless gas with a typical odour, produced by dehydrating methanol.

Methane hydrate

A solid substance formed at low temperatures on the ocean floors of Earth by the high pressure.

Trichloromethane, chloroform (CHCl₃)

Also known as chloroform, used as a solvent in laboratories, earlier as an anaesthetic.

Dichloromethane (CH₂Cl₂)

It is produced by treating methane with chlorine gas and used as a solvent.

Harp

The harp is one of the oldest plucked string instruments.

Grouping of solids 1

This animation demonstrates various groups of solids through examples.

Basketball arena

Basketball is one of the most popular team sports.

Grouping of solids 2

This animation demonstrates various groups of solids through examples.

Building shapes (multi colour)

Build 3D shapes from unit cubes with the help of several views.

Grouping of solids 4

This animation demonstrates various groups of solids through examples.

Building shapes (one colour)

Build 3D shapes from unit cubes with the help of several views.

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