Weathering is an important geological mechanism which can destabilize the earth’s surface materials and remove them by erosive processes. Weathering is the physical disintegration and chemical decomposition of a rock mass on the land. It is a unique phenomena happening on the earth’ surface. Weathering is a collective term used to denote the mechanical, chemical and biological(organic) processes that take place on the earth’s surface. Weathering of rock-forming minerals can create new products from pre-existing rocks. In many regions, soils are the ultimate products of weathering. Weathering of rocks releases chemical compounds that become available for biological processes. It is necessary to study the factors that are influencing the weathering processes.
Weathering is an important geological mechanism which can destabilize the earth’s surface materials and remove them by erosive processes. Weathering is the physical disintegration and chemical decomposition of a rock mass on the land. It is a unique phenomena happening on the earth’ surface. Weathering is a collective term used to denote the mechanical, chemical and biological(organic) processes that take place on the earth’s surface. Weathering of rock-forming minerals can create new products from pre-existing rocks. In many regions, soils are the ultimate products of weathering. Weathering of rocks releases chemical compounds that become available for biological processes. It is necessary to study the factors that are influencing the weathering processes.
A theory explaining the structure of the earth's crust and many associated phenomena as resulting from the interaction of rigid lithosphere plates that move slowly over the underlying mantle.
Gravity pulls the rocks, soils and debris on a downward slope, naturally, without any chemical change. This downward movement is called as mass -movement or mass-wasting.
Landslides, mudflows and rockfalls are all belonging to this category of geomorphic processes.
Mass-wasting may lead to severe natural disasters by affecting the life and building structures in different places. Understanding of mass-wasting will certainly help to mitigate the impacts of these hazards and plan the development activities.
Major Features of Earth's Surface
Evolution of Surface Features
Major Features of Continental Surface
Major Features of Oceanic Surface
Surface Features of the globe.
Evaluation of the earth
A theory explaining the structure of the earth's crust and many associated phenomena as resulting from the interaction of rigid lithosphere plates that move slowly over the underlying mantle.
Gravity pulls the rocks, soils and debris on a downward slope, naturally, without any chemical change. This downward movement is called as mass -movement or mass-wasting.
Landslides, mudflows and rockfalls are all belonging to this category of geomorphic processes.
Mass-wasting may lead to severe natural disasters by affecting the life and building structures in different places. Understanding of mass-wasting will certainly help to mitigate the impacts of these hazards and plan the development activities.
Major Features of Earth's Surface
Evolution of Surface Features
Major Features of Continental Surface
Major Features of Oceanic Surface
Surface Features of the globe.
Evaluation of the earth
Igneous rocks formaion through chemical weatheringrita martin
Igneous rocks are generally termed as fire rocks formed either underground or above ground there are two types Intrusive, Extrusive igneous rocks mainly containing high silica content
S6E5. Students will investigate the scientific view of how the earth’s surface is formed.
d. Describe processes that change rocks and the surface of the earth.
Similar to Chemical and biological weathering lesson 5 (20)
A workshop hosted by the South African Journal of Science aimed at postgraduate students and early career researchers with little or no experience in writing and publishing journal articles.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Safalta Digital marketing institute in Noida, provide complete applications that encompass a huge range of virtual advertising and marketing additives, which includes search engine optimization, virtual communication advertising, pay-per-click on marketing, content material advertising, internet analytics, and greater. These university courses are designed for students who possess a comprehensive understanding of virtual marketing strategies and attributes.Safalta Digital Marketing Institute in Noida is a first choice for young individuals or students who are looking to start their careers in the field of digital advertising. The institute gives specialized courses designed and certification.
for beginners, providing thorough training in areas such as SEO, digital communication marketing, and PPC training in Noida. After finishing the program, students receive the certifications recognised by top different universitie, setting a strong foundation for a successful career in digital marketing.
Francesca Gottschalk - How can education support child empowerment.pptxEduSkills OECD
Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
3. Decomposition of rock in situ resulting
from chemical change
Water (rain, fog, moisture, ocean etc) is
the key medium for chemical weathering.
Common in warm humid climate (high
temperature & high rainfall)
Weathered rocks by this process have a
dull pitted appearance
5. Oxygen dissolved in
water reacts with mineral
iron in the rock
The rock is converted to
iron oxide
Always seen as reddish-
brown crust
This conversion
weakened the mineral
bonding and
consequently the whole
6.
7.
8.
9. Involves in the expansion of minerals
resulting from the absorption of water
E.g. Clay minerals are capable of absorbing
large quantities of water into their crystal
structure
When this happen, they exerts stresses
within the rock which may eventually cause it
to break apart
10.
11. Involves a chemical reaction
between hydrogen ions in water with certain
minerals in the rock
E.g. Weakly acidic rainwater causes
feldspar to be converted into white powdery
clay (kaolin) which breaks down easily
14. Is a form of solution weathering
Common in rocks composed of calcium
carbonate such as limestone and chalk
Rainwater mixed with carbon dioxide form
carbonic acid
The acid water change the calcium
carbonate to soluble calcium bicarbonate
which is then easily washed away
15.
16.
17. Simply the
dissolving
minerals in water
E.g Halite (rock
salt) dissolve in
water
Quartz dissolves
at an extremely
slow rate
18.
19.
20.
21.
22. Spheroidical Weathering
A type of chemical
weathering
Creates rounded boulders
and domed monolith
Typically granitic in
composition
Rock forms at great
temperatures and pressures
27. Caused by the action living organisms
Can lead to physical break down of rock
(Biophysical)
Also chemical attack (Biochemical weathering)
28. 1. By plant roots
2. By animals such as rodents
and earthworms
3. By human activities
29. By plant roots:
When roots
penetrate
into
cracks, they
will usually
break rocks
apart
30.
31. By animals:
Help to widen and
loosen the joints in
rocks and expose
underlying rocks to
weathering
processes as they
burrow through the
ground
32. By human activities:
Clearing of land for
cultivation
Construction and
mining activities
This activities break
up rocks and expose
them to the
weathering
33. Organic acids from
dead plants and root
can help to decompose
rock
Chelation is the effect
of organic acid on rock
Waste and organic
acids from dead
animals help to
weather rocks
chemically
34. Human activities:
Industrialisation
can cause pollution
such emission of
sulphur dioxide
which can produce acid rain
Accelerate the chemical weathering process of
hydrolysis, carbonation and solution
