Page 329 - New Medley 5 Semester 1

Competencies
C-1.1

• Critical thinking
• Information literacy
21st CENTURY SKILLS
• AIL
3 Major Landforms

Warm Up

Which type of landform gives birth to a waterfall?

The Earth is a unique planet in the Solar System. Its surface is made

up of landmasses and water bodies. About 29 per cent of the Earth’s
surface is land and about 71 per cent is under water. The surface of the

Earth is not uniform and is always changing. There are flat areas called
plains. At some places, the land rises to form mountains, plateaus and

hills. The variations in the Earth’s surface are called its relief features.
The main types of relief features or landforms are mountains, plateaus,

plains, deserts and river valleys.

Mountains

The mountains are the elevated parts of the Earth’s surface. They are

about 900 metres higher than the sea level. The mountains have steep
slopes, sharp ridges and peaks. These are the highest landforms on the

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