Question

Why chemical weathering and biological weathing is negligible in polar climates

Answer 1

Answer:

The process by which bigger rocks are broken down into smaller one and lastly they are broken down to the particles with which they were formed is called weathering.

Chemical weathering involves total change in the chemical composition of minerals of the rock particles. In polar area due to freezing condition and absence of moisture and air chemical weathering is less frequent.

Biological weathering are those done by decomposition of rocks with various fungi, bacteria, lichens. In polar climate all these organisms can not survive due to the freezing condition , so biological weathering is negligible there.

Answer 2

For chemical weathering because in polar region climate is cold and rocks are covered with snow and layers of ice. Therefore rocks are avoided with contact of outer atmosphere which means rocks are unaffected by various reaction with oxygen, carbon dioxide and other gases.

So, there will no breakdown of rocks and minerals. For biological weathering since climate is cold animals like rat and rabbits are not found in polar region. Human activities are also not in polar region such as construction, mining and other activities.