Question

Q.3 Answer the following.


1. Explain properties of soil.
2. Explain breathing.​

Answer 1

Answer:

1 .Explain properties of soil.

Ans --All soils contain mineral particles, organic matter, water and air. The combinations of these determine the soil's properties – its texture, structure, porosity, chemistry and colour. Relative size of sand, silt and clay particles. Soil is made up of different-sized particles. Sand particles tend to be the biggest.

2 .Explain breathing.

Ans --Breathing (or ventilation) is the process of moving air into and out of the lungs to facilitate gas exchange with the internal environment, mostly to bring in oxygen and flush out carbon dioxide. ... The body's circulatory system transports these gases to and from the cells, where "cellular respiration" takes place.

Answer 2

Answer:

1.All soils contain mineral particles, organic matter, water and air. The combinations of these determine the soil's properties – its texture, structure, porosity, chemistry and colour. Relative size of sand, silt and clay particles. Soil is made up of different-sized particles. Sand particles tend to be the biggest.

2. Breathing: The process of respiration, during which air is inhaled into the lungs through the mouth or nose due to muscle contraction and then exhaled due to muscle relaxation.

Explanation:

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