Question

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Answer 1

Answer:

1. break down

2. breaking down of big rock

3. An oxidation-reduction (redox) reaction is a type of chemical reaction that involves a transfer of electrons between two species. Hydrogen generally has an oxidation state of +1 in compounds. ... Oxygen generally has an oxidation state of -2 in compounds.

4. The O horizon is the upper layer of the topsoil which is mainly composed of organic materials such as dried leaves, grasses, dead leaves, small rocks, twigs, surface organisms, fallen trees, and other decomposed organic matter.

5. Podu is a form of shifting cultivation using slash-and-burn methods. Traditionally used on the hill-slopes of Andhra Pradesh, it is similar to the jhum method found in north-east India and the bewar system of Madhya Pradesh.

Explanation:

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Answer 2

Answer:

1 breaking down

2 Mechanical weathering is the process of breaking big rocks into little ones.

3 oxygen

4 Mostly minerals from parent material with organic matter incorporated.

5 Shifting cultivation or jhum cultivation

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