Question

1. The forces which originate from within the earth are called __________ forces.
2. The wearing away of the earth's surface is called __________.
3. A mountain __________ has several parallel, long and narrow ranges.
4. Big cities are located in the ___________.

Answer 1

1. The forces which originate from within the earth are called tectonic forces.

Explanation: Tectonic forces originate from within the Earth's surface. They cause irregularities on the surface of the Earth, thereby forming highlands and lowlands.

2. ​The wearing away of the earth's surface is called erosion.

Explanation: Erosion is the phenomenon of the removal of the top layer of the Earth's surface through the action of agents like air, running water and glaciers.

3. ​A mountain chain has several parallel, long and narrow ranges.

Explanation: In a mountain chain, there are numerous long mountain ranges running parallel to each other. For example, the Himalayan mountain chain is divided into the higher, middle and lower Himalayas.

4. ​Big cities are located in the plains.

Explanation: Plains are wide stretches of land at a relatively low height. They are the fertile lands formed by the deposition of sand and silt brought by rivers. Hence, they are densely populated. This is the reason big cities are located in plains.