Volcanoes form when magma rises from the Earth's mantle and crust and erupts from a vent. Three main triggers for an eruption are the buoyancy of magma, pressure from gases in magma, and injection of new magma. A volcano's future eruptions can be forecast based on its past eruptions. Primary effects are direct results of an eruption like lava flows, while secondary effects stem from primary ones, such as lahars, landslides and flooding caused by volcanic deposits.
Internal Structure of The Earth
Physical Layering
Determining the Earth's Internal Structure
C. The Earth's Internal Layered Structure and Composition
D. VELOCITY AND DENSITY VARIATION WITHIN THE EARTH
The immense amount of heat energy released from gravitational energy and from the decay of radioactive elements melted the entire planet, and it is still cooling off today. Denser materials like iron (Fe) sank into the core of the Earth, while lighter silicates (Si), other oxygen (O) compounds, and water rose near the surface.
The earth is divided into four main layers: the inner core, outer core, mantle, and crust. The core is composed mostly of iron (Fe) and is so hot that the outer core is molten, with about 10% sulphur (S). The inner core is under such extreme pressure that it remains solid. Most of the Earth's mass is in the mantle, which is composed of iron (Fe), magnesium (Mg), aluminum (Al), silicon (Si), and oxygen (O) silicate compounds. At over 1000 degrees C, the mantle is solid but can deform slowly in a plastic manner. The crust is much thinner than any of the other layers, and is composed of the least dense potassium (K), calcium (Ca) and sodium (Na) aluminum-silicate minerals. Being relatively cold, the crust is rocky and brittle, so it can fracture in earthquakes.
Internal Structure of The Earth
Physical Layering
Determining the Earth's Internal Structure
C. The Earth's Internal Layered Structure and Composition
D. VELOCITY AND DENSITY VARIATION WITHIN THE EARTH
The immense amount of heat energy released from gravitational energy and from the decay of radioactive elements melted the entire planet, and it is still cooling off today. Denser materials like iron (Fe) sank into the core of the Earth, while lighter silicates (Si), other oxygen (O) compounds, and water rose near the surface.
The earth is divided into four main layers: the inner core, outer core, mantle, and crust. The core is composed mostly of iron (Fe) and is so hot that the outer core is molten, with about 10% sulphur (S). The inner core is under such extreme pressure that it remains solid. Most of the Earth's mass is in the mantle, which is composed of iron (Fe), magnesium (Mg), aluminum (Al), silicon (Si), and oxygen (O) silicate compounds. At over 1000 degrees C, the mantle is solid but can deform slowly in a plastic manner. The crust is much thinner than any of the other layers, and is composed of the least dense potassium (K), calcium (Ca) and sodium (Na) aluminum-silicate minerals. Being relatively cold, the crust is rocky and brittle, so it can fracture in earthquakes.
Story mode about volcanic eruption preparedness, Philippine setting
credits to Internet and book sources for information and data
Links are broken
(created for a group/school presentation)
Geologic processes that shape the planet Earth, which occurs beneath the surface and associated with Interior forces. Download this so you can see some animations and some hidden images behind some pictures.
Story mode about volcanic eruption preparedness, Philippine setting
credits to Internet and book sources for information and data
Links are broken
(created for a group/school presentation)
Geologic processes that shape the planet Earth, which occurs beneath the surface and associated with Interior forces. Download this so you can see some animations and some hidden images behind some pictures.
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
A volcano is an opening in the Earthâs crust that allows molten rock, gases and debris to escape to the surface.
During a volcanic eruption, lava and other debris can flow at speeds of up to 100 mph, destroying everything in their path.
Different magma types behave differently as lava flows, depending on their temperature, viscosity, and gas content.
Magmas that are generated deep within the Earth begin to rise because they are less dense than the surrounding solid rocks.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
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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 wasnât 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.
Palestine last event orientationfvgnh .pptxRaedMohamed3
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An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
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In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
Operation âBlue Starâ 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.
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as âdistorted thinkingâ.
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
The Roman Empire A Historical Colossus.pdfkaushalkr1407
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The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesarâs dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empireâs birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empireâs society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
3. When a part of the earth's upper mantle or lower
crust melts, magma forms. A volcano is essentially an
opening or a vent through which this magma and
the dissolved gases it contains are discharged.
Although there are several factors triggering a
volcanic eruption, three predominate: the buoyancy
of the magma, the pressure from the exsolved gases
in the magma and the injection of a new batch of
magma into an already filled magma chamber.
4. ⢠The buoyancy of the magma:
As rock inside the earth melts, its
volume increases producing a
melt that is less dense than the
surrounding rock. This lighter
magma then rises toward the
surface by virtue of its buoyancy.
finally, the magma reaches the
surface and erupts.
5. ⢠The pressure from the gases in the
magma:
Magmas also contain dissolved volatiles
such as water, sulfur dioxide and carbon
dioxide. Experiments have shown that the
amount of a dissolved gas in magma at
atmospheric pressure is zero, but rises
with increasing pressure.
6. Injection of new magma into a chamber that
is already filled with :
This injection forces some of the magma in
the chamber to move up in the conduit and
erupt at the surface.
7. Although volcanologists are well aware of these
three processes, they cannot yet predict a volcanic
eruption. But they have made significant advances in
forecasting volcanic eruptions. Forecasting involves
probable character and time of an eruption in a
monitored volcano. The character of an eruption is
based on the prehistoric and historic record of the
volcano in question and its volcanic products. For
example, a violently erupting volcano that has
produced ash fall, ash flow and volcanic mudflows
(or lahars) is likely to do the same in the future.
8. The effects of volcanic eruptions can be
divided into primary and secondary effects.
The primary effects are immediate and come
from the eruption itself whereas
The secondary effects result from the
primary effects.
9. Primary effects of a volcanic eruption:
⢠Volcanic gases: All magma
contains dissolved gases
That are release during and
between eruptions. These
gases are mainly steam,
carbon dioxide and
compounds of sulphur and chlorine.
⢠Lava flows: These are streams of molten rock.
10. ⢠Pyroclastic flows - These are high speed
avalanches of hot ash, rock fragments and gas
which move down the sides of a volcano. These
flows occur when the vent area or ash column
collapses.
⢠Tephra - The explosive
power of an eruption causes
old lava to be blasted into tiny
pieces and hurled into the air.
The fragments are tephra.
11. Secondary effects of a volcanic eruption:
⢠Lahars - These are mixtures
of water, rock, ash, sand
and mud that originate from
the slopes of a volcano.
Lahars often happen because
of heavy rainfall eroding
volcanic deposits or heat from
a volcanic vent suddenly
melting snow and ice.
12. ⢠Landslides - Heat from cooling magma can
cause hydrothermal alteraton of the rocks,
turning sections of them into clay. This
weakens the rocks and increases the risk of
slope failures.
⢠Flooding - Explosive eruptions can change
thge surface areas around a volcano and
disrupt drainage patterns, leading to long-
term flooding.
13. Other secondary effects include:
⢠Food / water supply interrupted.
⢠Homelessness.
⢠Businesses forced to close.
⢠Cost of insurance claims.
⢠Unemployment.
⢠Long-term issues with the tourism industry.
14. A number of the volcanoesâ effects are
shown on the diagram below.