Millions of years ago, Mount Everest was not a mountain but was underneath the ocean.

Most mountains are found in huge rows called mountain strings.

There are no mountains in the bottom of the oceans.

As the rocks of the Earth's crust move, the cracks or breaks that form are called faults.

Sometimes great blocks of rock are pushed up between two faults, forming fold mountains.

Sometimes, as the Earth's plates push towards each other, they push the rocks up into folds called block mountains.

Many of the mountains that stand alone were made by volcanoes.

The highest mountain range on Earth is the Himalayas in Asia.

Mountains are built by the same forces that causes earthquakes.

The Alps, Andes and Himalayas are examples of block mountains.

There are no high mountains in Antartica.