Oil molecule

Triglycerides containing unsaturated fatty acids are liquid at room temperature.

Lead-acid battery

Electrochemical processes in a lead-acid battery produce electric current.

The first days in school

Learn the concept of colors, numbers, letters and shapes while playing

Dice

Regular dice can be used for solving statistical and probability exercises.

Conformations of ethane

The staggered conformation of ethane is more stable than the eclipsed conformation.

Endocrine system

Glands of the endocrine system secrete hormones into the blood.

Planaria gonocephala

One of the most common types of flatworms.

American bison

The American bison is the largest land animal in North America.

Dividing Space into Regions by 3 Planes

Division of space by three intersecting planes in several different arrangements.

Attack of Pearl Harbor (1941)

The United States entered World War II after the devastating attack by the Japanese army.

Volume of a tetrahedron

To calculate the volume of a tetrahedron we start by calculating the volume of a prism.

The Macedonian Empire

The legendary ruler and military leader, Alexander the Great, established a vast empire.

Great Mosque of Djenné (1907)

The mosque, built in a distinctive architectural style, is the largest adobe structure in the world.

Hot air balloon

A hot air balloon is a balloon aircraft which is lifted by hot air.

Water turbine, generator

Water turbines convert the kinetic energy of water into electric current.

Battle of Thermopylae (480 B.C.)

The battle of the Greek-Persian War became famous for the heroic sacrifice of the Spartan soldiers.

Ukrainian Cossack (17th century)

Cossacks, members of independent semi-military communities, played an important role in the history of Ukraine.

Typical dwelling types

Every era and every culture has specific residential buildings.

Fat molecule

Three saturated fatty acid molecules linked to a glycerol molecule.

Jameh Mosque (Isfahan, 15th century)

Its architectural solutions and ornamentation rank this mosque among the masterpieces of Islamic art.

Added to your cart.