Balbharati Solutions Class 9 Geography Exogenetic Processes Part-1
Welcome to NCTB Solutions. Here with this post we are going to help 9th class students for the Solutions of Balbharati Class 9 Geography Text Book Chapter 3, Exogenetic Processes Part-1. Here students can easily find step by step solutions of all the questions in Exogenetic Processes Part-1. Also our Expert Geography Teacher’s solved all the question answer with easily understandable language with proper guidance so that all the students can understand easily. Here in this post students will get chapter 3 solutions. Here all the Question Answer are based on Balbharati latest syllabus. Here all the question and answer are based on Maharashtra State Board latest syllabus.
Exogenetic Processes Part-1 Exercise question Solutions :
Question no – (1)
(a) What is mechanical weathering ?
Answer :
Mechanical weathering : Breaking down of rocks or components in the earth’s crust through the measures of physical forces is called mechanical weathering.
(b) What are the main types of chemical weathering?
Answer :
The main types of chemical weathering are :
- Carbonation,
- Solution,
- Oxidation.
(c) How does biological weathering occur?
Answer :
Biological weathering occurs because of living organisms.
(d) Distinguish between weathering and mass wasting.
Answer :
Difference between the weathering and mass wasting are as follows :
- Weathering :
Breaking or weakening of rock is a natural phenomenon it is called weathering.
There are three types of weathering- mechanical, chemical and biological.
- Mass Wasting :
When weathered particles move down due to gravity alone the process is called mass movements or mass wasting.
But mass twisting is of two types repeat and slow.
Question no – (2)
(a) Climate affects earthquakes
Answer :
= This statement is False.
= Correction : The activities of the earth’s tectonic plates affects earthquakes.
(b) Mechanical weathering is less effective in humid climates.
Answer :
= This statement is True
(c) Mechanical weathering happens on a large scale in dry climates.
= This statement is True.
Answer :
(d) The breaking down of rocks into smaller particles is called weathering.
= This statement is True.
Answer :
(e) Lateritic rocks are formed through exfoliation.
Answer :
= This statement is False.
= Correction : For the activity of chemical weathering lateritic rocks are formed.
Question no – (3)
Answer :
Weathering process :
(i) Mechanical weathering :
- Block Disintegration,
- Exfoliation.
(ii) Chemical weathering :
- Carbonation,
- Solution,
- Oxidation.
(iii) Biological weathering :
- Burrowing by animals,
- Algae, mosses and lichens.
Question no – (4)
Answer :
(a) Some animals live inside the grounds by making burrows.
= Biological weathering.
(b) The rock rusts.
= Oxidation.
(c) Water which has accumulated in the crevices of the rocks freezes. Consequently, the rock breaks.
= Action of frost.
(d) The pipes supplying water in colder regions break.
= Mechanical weathering.
(e) Sand formation occurs in deserts.
= Mechanical weathering.
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