The document summarizes the theory of plate tectonics. It explains that the Earth's crust is broken into plates that move due to convection currents in the mantle. There are three types of plate boundaries - divergent where plates move apart and new crust is formed, convergent where plates collide and one slides under the other, and transform where plates slide past each other. The constant movement of plates is what creates geological features like mountains and ocean trenches.
Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core. The plates act like a hard and rigid shell compared to Earth's mantle. This strong outer layer is called the lithosphere.
Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core. The plates act like a hard and rigid shell compared to Earth's mantle. This strong outer layer is called the lithosphere.
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.
Earth and Life Science
Earth Materials and Processes
Deformation of the Crust: Continental Drift Theory
Learning Competencies
The learners shall be able to explain how the continents drift (S11/12ESId-20), and cite evidence that support continental drift (S11/12ES-Id-21).
Specific Learning Outcomes
At the end of the lesson, the learners will be able to:
1. Discuss the history behind the Theory of Continental Drift;
2. Describe the Continental Drift Theory; and
3. Enumerate and explain the evidence used to support the idea of drifting continents.
The reason for the occurrence of such a huge mass of water on the globe, is still a myth and reality. The reason goes back to the Origin of Earth itself. The exact mode of origin is not precisely known. Scientists assume, both Primary and secondary sources would have given rise to all both air and water on the earth. Two possible sources as internal source (or) external source have been proposed so far. Some of them are attributed towards the theories of origin of the earth.
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.
Earth and Life Science
Earth Materials and Processes
Deformation of the Crust: Continental Drift Theory
Learning Competencies
The learners shall be able to explain how the continents drift (S11/12ESId-20), and cite evidence that support continental drift (S11/12ES-Id-21).
Specific Learning Outcomes
At the end of the lesson, the learners will be able to:
1. Discuss the history behind the Theory of Continental Drift;
2. Describe the Continental Drift Theory; and
3. Enumerate and explain the evidence used to support the idea of drifting continents.
The reason for the occurrence of such a huge mass of water on the globe, is still a myth and reality. The reason goes back to the Origin of Earth itself. The exact mode of origin is not precisely known. Scientists assume, both Primary and secondary sources would have given rise to all both air and water on the earth. Two possible sources as internal source (or) external source have been proposed so far. Some of them are attributed towards the theories of origin of the earth.
Plate Tectonic is a theory explaining the structure of the earth's crust and many associated phenomena as resulting from the interaction of rigid lithospheric plates which move slowly over the underlying mantle.
GOAL: To create a poster that explains the phenomena of blue sky using the concept of wavelength and frequency of visible light.
SITUATION: As the creative head in the science club of Macasandig National High School, you are tasked to create a poster showcasing the phenomena of blue sky on Science Club bulletin board.
PRODUCT: A creative poster explains the phenomena of blue sky. The poster should be in 1/8 illustration board.
faults generate earthquakes.
S8ES-IIa- 14
Objectives:
1. Describe what fault is and how these faults related to earthquakes.
2. Determine the extent of damage an earthquake can do in a particular location.
Article Reading
Earthquake wreaks havoc in the Philippines more than 1,000 people are killed when a 7.7-magnitude earthquake strikes Luzon Island in the Philippines on this day in 1990. The massive tremor wreaked havoc across a sizeable portion of Luzon, the country’s largest island, with Baguio City suffering the most devastating effects.
The epicenter of the quake, which struck at 4:26 p.m., was north of Manila in the Nueva Ecija province. Reports indicate that the shaking went on for nearly a full minute. Collapsing buildings were the main cause of damage and death. Getting out of a multi-story building was a good safety precaution that afternoon, although many people were injured and a few even died in stampedes of others doing the same thing.
At Christian College, a six-story building completely collapsed, trapping approximately 250 students and teachers inside. Heroic rescue efforts saved many, but some victims who did not die in the collapse were found dead later from dehydration because they were not pulled out in time.
All types of buildings, including several resort hotels in Baguio, known as the
Philippines’ Summer Capital, suffered tremendous damage. Most of the city’s 100,000
residents slept outdoors that evening and during the following week, afraid to return to
their homes amid the frequent aftershocks. For days, workers pulled bodies from the
demolished buildings in Baguio. The best estimate is that 1,000 bodies were eventually
recovered. At least another 1,000 people suffered serious injuries. Rescue efforts were
hampered severely because the three main roads into the city were blocked by landslides. Hundreds of motorists were stranded on the roads as well.
A fault is a fracture or zone of fractures between two blocks of
rock. Faults allow the blocks to move relative to each other.
This movement may occur rapidly, in the form of an earthquake - or may occur slowly, in the form of creep. Faults may range in length from a few millimeters to thousands of kilometers. Most faults produce repeated displacements over geologic time.
The ground in the area of fault tends to remain not moving
because of frictional force between the two opposing plates (boxes). As stronger forces (rubber band) shakes up the fault, the friction (tape) can no longer hold up the plates (box) thus resulting to a slip in the plates t
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Comprehensive program for Agricultural Finance, the Automotive Sector, and Empowerment . We will define the full scope and provide a detailed two-week plan for identifying strategic partners in each area within Limpopo, including target areas.:
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𝘼𝙣𝙩𝙞𝙦𝙪𝙚 𝙋𝙡𝙖𝙨𝙩𝙞𝙘 𝙏𝙧𝙖𝙙𝙚𝙧𝙨 𝙞𝙨 𝙫𝙚𝙧𝙮 𝙛𝙖𝙢𝙤𝙪𝙨 𝙛𝙤𝙧 𝙢𝙖𝙣𝙪𝙛𝙖𝙘𝙩𝙪𝙧𝙞𝙣𝙜 𝙩𝙝𝙚𝙞𝙧 𝙥𝙧𝙤𝙙𝙪𝙘𝙩𝙨. 𝙒𝙚 𝙝𝙖𝙫𝙚 𝙖𝙡𝙡 𝙩𝙝𝙚 𝙥𝙡𝙖𝙨𝙩𝙞𝙘 𝙜𝙧𝙖𝙣𝙪𝙡𝙚𝙨 𝙪𝙨𝙚𝙙 𝙞𝙣 𝙖𝙪𝙩𝙤𝙢𝙤𝙩𝙞𝙫𝙚 𝙖𝙣𝙙 𝙖𝙪𝙩𝙤 𝙥𝙖𝙧𝙩𝙨 𝙖𝙣𝙙 𝙖𝙡𝙡 𝙩𝙝𝙚 𝙛𝙖𝙢𝙤𝙪𝙨 𝙘𝙤𝙢𝙥𝙖𝙣𝙞𝙚𝙨 𝙗𝙪𝙮 𝙩𝙝𝙚 𝙜𝙧𝙖𝙣𝙪𝙡𝙚𝙨 𝙛𝙧𝙤𝙢 𝙪𝙨.
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1. The Theory of Plate
Tectonics
• Is a theory of why and how the continents
move.
• The earth consist of two types of crust.
–Oceanic Crust
• Material on the ocean floor
–Continental Crust
• Crust that makes up land masses
2. Plates
• Continental Crust
–Is more buoyant and not as dense as oceanic
crust. It is comprised mainly of granitic rock.
• Oceanic Crust
–Is denser than continental crust because it is
crushed by the massive weight of water that is on
it. It is mainly comprised of basaltic and
sedimentary rock.
–
2
3. The Theory of Plate
Tectonics
• The oceanic and continental crust make up
the lithosphere.
–Thin outer shell of the earth
• Below the lithosphere lies the
asthenosphere, a layer of molten rock, that is
melted and flows (like putty) under pressure.
4. The Theory of Plate
Tectonics
• The oceanic and continental crust make up
the lithosphere.
–Thin outer shell of the earth
• Below the lithosphere lies the
asthenosphere, a layer of molten rock, that is
melted and flows (like putty) under pressure.
5. The Theory of Plate
Tectonics
• According to the theory, the lithosphere is
broken into plates that ride (or float) on the
asthenosphere.
–Like blocks of wood floating on water.
• Most plates are composed of both
continental and oceanic crust.
6. • Most plates are composed of both
continental and oceanic crust.
5
7. Lithospheric Plate
Boundaries
• Some plates move toward each other others
are moving apart, and some are simply
sliding past one another.
• This constant movement is what has created
our earth’s major surface.
–Mountain Ranges
–Deep-ocean Trenches
9. Practice...
The wheels on the bus go
round and round
round and round
round and round,
The wheels on the bus go
round and round
all through the town.
10. Convection Cells
The mantle of the earth
Goes round and round,
Round and round
Round and round,
The mantle of the earth
Goes round and round
All underground
11. Spreading Centers
The convection cells form
Spreading centers Rift Valley
Spreading centers
Spreading centers,
The convection cells form
Spreading centers
Creating rift valleys
12. Subduction Zones
When plates come together
One slides down, When plates come together
One slides down, One slides down,
One slides down. We call it a subduction zone.
13. Transform Fault
Plates slide past each
other at transform faults
Transform faults
Transform faults,
Plates slide past each
other at transform faults
and we live next to one!
S a n A n d r e a s F a u l t
14. Divergent Boundaries
• Plates are moving apart from each other
• We also term these sites spreading centers.
• Form what is known as a rift valley.
It is at divergent plate
boundaries where new
crust is created.
15. Convergent Boundaries
• Plates are pushing into neighboring plates.
• Usually a subduction zone occurs. That is
when oceanic crust crashes into and slides
under continental crust.
• 3 convergent boundaries can occur:
–continental/oceanic crust collision
–oceanic/oceanic collision
–continental/continental collision
17. Causes of Plate Motion
• Many scientist believe that the movement of
plates is do to convection cells, movement
caused by hot and cooler spots in the
mantle. So, the mantle is churning.
18. Microplate Terrains Theory
–Each terrain has 3 characteristics
• Rocks and fossils unique to it’s terrain
• Major fault at every boundary
• Different magnetic properties