PMS MCQs

Most atmospheric ozone is concentrated in the stratosphere.
It absorbs much of the Sun's harmful ultraviolet radiation.

A water molecule contains two hydrogen atoms and one oxygen atom.
Its formula is H₂O.

Common salt is sodium chloride.
Its chemical formula is NaCl.

The Berlin Wall opened in November 1989.
Its fall became a symbol of the end of Cold War divisions in Europe.

Christopher Columbus reached islands in the Caribbean in 1492.
His voyage connected Europe and the Americas on a sustained basis.

Vasco da Gama reached India by sea in 1498.
He sailed around the southern tip of Africa.

Magellan's expedition achieved the first circumnavigation.
Magellan died before the voyage was completed by Juan Sebastián Elcano.

The Silk Road was a network of overland and maritime routes.
It carried goods, ideas, and technologies across Eurasia.

Hammurabi was a king of Babylon.
His law code is one of the best-known ancient legal collections.

Machu Picchu was built by the Inca civilization.
It is located high in the Andes of Peru.

The cell is the smallest structural and functional unit of living organisms.
All living things are made of one or more cells.

The heart pumps blood through the circulatory system.
Its contractions deliver oxygen and nutrients to tissues.