This document discusses weathering and soil formation. It describes two types of weathering - mechanical and chemical - and their causes such as temperature changes, frost action, oxidation, and acids. Mechanical weathering breaks rocks into smaller pieces without changing their chemical composition, while chemical weathering alters the rocks' minerals. Over time, weathered rocks break down into soil. Factors like climate, rock type, and time influence soil formation, which results in distinct layers or horizons of topsoil, subsoil, and partially weathered parent material.
Geology is the scientific study of the all constituents of planets, their internal and external forms and processes. More precisely, it is the study of nature, structure and history of the planet. Earth is the home to all life, well known to the humankind. Geology, itself, is a major part of The Earth and atmospheric sciences, which were born as twins . The subject of geology encompasses all aspects including the composition, structure, physical properties, and history of a planets'( like Earth's) inter-related components and the processes that are shaping the features on the surface. Geologists are the scientists who study the origin, occurrence, distribution and utilities of all materials(metallic, non-metallic, inorganic, etc), minerals, rocks, sediments, soils, water, oil and all other inorganic natural resources. It is a very vast subject covering a wide spectrum of scientific principles and holding hundred and fifty plus scientific branches. This report enumerates and highlights most of them, in a nutshell, for all those who intends to know for planning their career path.
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.
ALL ABOUT WEATHERING AND EROSION .. Weathering causes the disintegration of rock near the surface of the earth. Plant and animal life, atmosphere and water are the major causes of weathering. Weathering breaks down and loosens the surface minerals of rock so they can be transported away by agents of erosion such as water, wind and ice. There are two types of weathering: mechanical and chemical.
Geology is the scientific study of the all constituents of planets, their internal and external forms and processes. More precisely, it is the study of nature, structure and history of the planet. Earth is the home to all life, well known to the humankind. Geology, itself, is a major part of The Earth and atmospheric sciences, which were born as twins . The subject of geology encompasses all aspects including the composition, structure, physical properties, and history of a planets'( like Earth's) inter-related components and the processes that are shaping the features on the surface. Geologists are the scientists who study the origin, occurrence, distribution and utilities of all materials(metallic, non-metallic, inorganic, etc), minerals, rocks, sediments, soils, water, oil and all other inorganic natural resources. It is a very vast subject covering a wide spectrum of scientific principles and holding hundred and fifty plus scientific branches. This report enumerates and highlights most of them, in a nutshell, for all those who intends to know for planning their career path.
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.
ALL ABOUT WEATHERING AND EROSION .. Weathering causes the disintegration of rock near the surface of the earth. Plant and animal life, atmosphere and water are the major causes of weathering. Weathering breaks down and loosens the surface minerals of rock so they can be transported away by agents of erosion such as water, wind and ice. There are two types of weathering: mechanical and chemical.
Done By: khorg_Platinum Group
School Name: Al Khor Independent School for Girls
Environmental Catalysis Module: Students examines different types of catalytic systems, including heterogeneous and homogeneous catalysis. Depending on the knowledge they gained during activities, the students are then asked to design their projects.
Our Project:
Sulfur dioxide is converted to sulfuric acid,
I made this presentation for my school project after that I thought that I should upload it on any slide so I uploaded this to help others in making presentations and getting ideas.It is a class 7 project.
The lithosphere is the solid shell of the planet Earth. That means the crust, plus the part of the upper mantle that behaves elastically on long timescales.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
A Strategic Approach: GenAI in EducationPeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
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?
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
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.
2. Weathering
The breaking down of rocks and other
materials on the Earth’s surface is called
weathering. A slow, continuous process, it
affects all substances exposed to the
atmosphere.
3. Types of Weathering
Rocks on the Earth’s surface are broken
down by two types of weathering:
mechanical and chemical.
4. Mechanical Weathering
When the forces of weathering break rocks
into smaller pieces but do not change the
chemical makeup of the rocks, the process
is called mechanical weathering. During
mechanical weathering, rocks are broken
into different shapes and smaller pieces.
At the beginning the edges are jagged, as
weathering continues, they become round.
5. Causes of Mechanical
Weathering
There are several causes of mechanical
weathering.
Temperature
Frost action
Organic activity
Gravity
abrasion
6. Temperature
Rocks can be broken apart by changes in
temperature. As rocks are heat up in the
sun during the day, the outside of the rock
expands. The inside of the rocks remain
cool and do not expand. When the air
temperature drops at night, the outside of
the rock cools and contracts. This
continuing cycle causes particles to break
off. This is called exfoliation.
7. Frost Action
Unlike most liquids, water expands when it
freezes. The repeated freezing and melting
of water, called frost action, is another
cause of mechanical weathering. When
water freezes in cracks in the rocks, it
expands, making the crack larger.In time,
this causes the rock to break into pieces.
8. Organic Activity
Plants and animals can cause mechanical
weathering. The roots of plants sometimes
loosens rock material. A plant growing in
a crack can make the crack larger as the
root spread out. This is known as root-pry.
It is organic since this activity is caused by
living things.
9. Gravity
Gravity is another agent of mechanical
weathering. Sometimes gravity pulls
loosened rocks down mountain cliffs in a
landslide. A landslide is a large movement
of loose rocks and soil. As the rocks fall,
they collide with one another and break
into smaller pieces. Falling rocks usually
occur in areas where a road has been cut
through, leaving cliffs on both sides.
10. Abrasion
Wind-blown sand causes mechanical
weathering . Abrasion is the wearing away
of rocks by solid particles carried by wind,
water or other forces. In desert regions, the
wind easily picks up and moves sand. The
sharp edges of the sand particles scrape off
pieces of exposed rocks. Running water
also carries loose rocks which scrape
against each other and break.
11. Chemical Weathering
When the chemical makeup of the rocks is
changed it is called chemical weathering.
During chemical weathering, changes
occur in the mineral composition of rocks.
Minerals can be added, removed or broken
down (decomposed).Many substances react
chemically with rocks to break them down.
12. Types of Chemical Weathering
There are several causes of chemical
weathering.
Water
Oxidation
Carbonation
Sulfuric acid
Plant acids
13. Water
Most chemical weathering is caused by water
and carbon dioxide. Water can dissolve
most of the mineral that hold rocks
together. Rocks that dissolve in water are
said to be soluble. Water can form acids
when it mixes with certain gases in the
atmosphere to speed up the decomposition
of rocks. Water can also combine with a
mineral to form a new mineral.
14. Oxidation
Chemical weathering is also caused by
oxidation. Oxidation is the process in
which oxygen chemically combines with
another substance. The result of oxidation
is the formation of an entirely different
substance. Iron in rocks combines with
oxygen in the air to form iron oxide, or
rust.
15. Carbonation
When carbon dioxide dissolves in water, a
weak acid called carbonic acid is formed.
When carbonic acid reacts chemically with
other substance, the process of carbonation
occurs. In nature, carbonic acid is formed
when carbon dioxide in the air dissolves in
rain. This acid rain falls to the ground and
sinks into the soil. It decomposes feldspar
and limestone.
16. Sulfuric Acid
The air in certain areas is polluted with
sulfur oxides. Sulfur oxides are a
byproduct of the burning of coal as a
source of energy. These compounds
dissolve in rainwater to form sulfuric acid.
Rain that contains sulfuric acid is one type
of acid rain. It is much stronger than
carbonic acid. Sulfuric acid corrodes
rocks, metals and other materials quickly.
17. Plant Acids
Plants produce weak acids that dissolve
certain minerals in rocks. Mosses and
lichens produce weak acids that dissolve
some of the minerals in the rocks they
grow on. Gradually the rocks break into
smaller pieces. They are important in the
formation of soil.
18. Rate of Weathering
The rate of weathering depends on several
factors, including:
The composition of the rock
The amount of time that the rock is
exposed on the Earth’s surface
The amount of exposed surface on a rock
19. Composition of Rocks
Two different types of rocks in the same
climate can weather differently, depending
on the minerals that make up each rock
type. If the minerals in a rock resist
chemical weathering, the rock is called a
stable rock. The stability of a rock can
vary depending on the climate in which the
rock is found. Limestone is stable in a dry
climate but not in a wet climate.
20. Amount of Time of Exposure
The amount of time that rock is exposed on
the Earth’s surface also affects its rate of
weathering. A very old rock that has not
been exposed to the forces of weathering
can remain almost unchanged. If a newly
formed rock is deposited on the Earth’s
surface it will begin to weather right away.
21. The Amount of Exposed Surface
The amount of exposed surface area on a
rock also affects its rate of weathering. As
rocks are broken down into many small
pieces, more rock surfaces are exposed and
more weathering takes place. In rocks that
contain many joints or cracks, various
chemicals easily come into contact with the
rock surfaces and break them down.
22. Soil Formation
The weathering of rocks on the Earth’s
surface results in the formation of soil.
Soil is formed when rocks are continuously
broken down by weathering. As rocks
weather, they break into smaller pieces.
These pieces are broken down into even
smaller pieces to form soil.
23. Importance of Soil
The formation of soil is extremely
important to most living organisms. Plants
depend on soil as source of food. Soil
supplies plants with minerals and water
needed for growth. Animals depend
indirectly on soil since they eat plants and
other animals that eat plants.
24. Residual Soil
Sometimes soil remains on top of its parent
rock, or the rock from which it was formed.
This is called residual soil. Residual soil
has a composition similar to that of the
parent rock it covers.
25. Transported Soil
Some soil is removed from the parent rock
by water, wind, glaciers and waves.Soil
that is moved away from its place of origin
is called transported soil. Transported soil
can be very different in composition from
the rock it covers.
27. Decay
Certain bacteria in the soil cause the decay
of dead plants and animals. This decaying
material is called humus. Humus is a dark-
colored material that is important for the
growth of plants. Some of the chemicals
produced during the process of decay
speed up the breakdown of rocks into soil.
28. Living Things
Living things such as moles, earthworms,
ants and beetles help to break apart large
pieces of soil as they burrow through the
ground. The burrows allow water to move
rapidly through the soil. The water speeds
up the weathering of the underlying rock.
29. Soil Composition
Pieces of weathered rock and organic
material, or humus, are the two main
ingredients of soil. Organic materials is
material that was once living or was
formed by the activity of living organisms.
Rock particles form more than 80% of soil.
Air and water are also present in soil.
30. Minerals in Soil
Clay and quartz are the most abundant
minerals in soil. Because they are stable,
they exist in the greatest quantities.
Potassium, phosphorus and the nitrogen
compounds called nitrates are important
chemicals in soil. They are vital to plant
growth.
31. Pore Spaces
Air and water fill the spaces between soil
particles. These are called pore spaces.
Plants and animals use the water and air in
these spaces, as well as the minerals
dissolved in water. Pore spaces provide
needed oxygen for healthy plant root
growth.
32. Different Compositions of Soil
The composition of soil varies from place
to place. The type of rock broken down by
weathering determines the kinds of
minerals in the soil. The type of
weathering also affects the composition of
soil. Mechanical weathering produces soil
with a composition similar to the rock
being weathered. Chemical weathering
produces soil with a different composition.
33. Soil Texture
The type of weathering also affects soil
texture. Texture refers to the size of the
individual soil particles. Soil particles vary
from very small to large. Both mechanical
and chemical weathering first breaks rocks
into gravel (2-64mm) and then in sand (less
than 2mm) and finally into silt.
34. Soil Horizons
As soil forms, it develops separate soil
layers called horizons. Each soil horizon is
different. A cross section of the soil
horizons is called soil profile. A soil
profile shows the different layers of soil.
35. Mature Soil
Soil that has developed three layers is
called mature soil. It takes thousands of
years and the proper conditions for soil to
develop three layers. The uppermost layer
of mature soil is called the A horizon. The
A horizon is a dark-colored soil layer in
which much activity by living organisms
takes place. Bacteria, earthworms and
beetles help the decay.
36. A Horizon
The soil in the A horizon is called topsoil.
Topsoil consists mostly of humus and other
organic materials. Humus supplies
minerals essential for plant growth.
Humus is spongy and stores water. It also
contains pore space for air and water.
Topsoil is the most fertile part of the soil.
37. B Horizon
Water that soaks into the ground washes
some minerals from the A horizon into the
second layer of soil, or the B horizon.
This process is called leaching.The B
horizon is just below the A horizon. The B
horizon is also made of clay and some
humus. The soil in the B horizon is called
subsoil. Subsoil is formed very slowly.
38. C Horizon
The third layer of soil is called the C
horizon. The C horizon consists of partly
weathered rock. The C horizon extends
down to the top of the unweathered parent
rock. The composition of the soil in the C
horizon is similar to that of the parent rock.
39. Immature Soil
. In some places, the upper layers of soil
are removed and the rocks below the soil
are exposed. The weathering process then
forms new soil from the exposed rocks.
This recently formed soil is immature
because there has not been enough time for
all three soil layers to form. The soil in the
northern regions where glacial erosion has
taken place, is immature soil.
40. Formation of Soil
There are several factors that determine
whether three layers of soil will form.
Time
Climate
Type of rock
Surface features of the region
41. Time
Time is one of the most important factors
in soil formation. The longer a rock is
exposed to the forces of weathering, the
more it is broken down. Mature soil is
formed if all three layers have had time to
develop.
42. Climate
Climate is another important factor in the
formation of soil. In areas with heavy
rainfall and warm temperatures, weathering
takes place more rapidly. Heavy rainfall
may wash much of the topsoil away. Since
Organisms are more plentiful these areas,
the soil is quickly replaced. They speed up
the chemical and mechanical weathering of
rocks.
43. Type of Rock
The type of rock in an area also affects soil
formation. Some rocks do not weather as
rapidly as other do. Rocks that do not
break down easily do not form soil rapidly.
In some climates it takes along time for
granite to break down. So soil formation
from granite is slow. But sandstone breaks
easily and forms soil quickly.
44. Surface Features of Region
The surface features of the region also
determine the speed at which soil is
formed. On very steep slopes, rainwater
running off the land erodes the soil and
exposes rock to weathering.