Grade 10 SCIENCE | Quarter 1 Module 5 (PART 1) | CONVERGENT BOUNDARY
Summary
TLDRIn this educational video, Mom Deya explores Module 5 for Grade 10 students, focusing on convergent boundaries in plate tectonics. She reviews the three types of plate boundaries and delves into the specifics of convergent boundaries, where plates move towards each other. The video explains the processes that occur when oceanic and continental crusts collide and when two continental crusts meet. It also discusses the significant effects of convergent boundaries on Earth's crust, including the formation of volcanic island arcs and trenches. The lesson is designed for students in sections Gold, Helium, Silver, Nickel, and Vanity, and includes interactive simulations to visualize the geological processes involved.
Takeaways
- đ The lesson focuses on convergent boundaries, a topic for Grade 10 students, specifically for sections Gold, Helium, Silver, Nickel, and Vanity.
- đ The primary learning objective is to explain the processes that occur along convergent plate boundaries, where tectonic plates move towards each other.
- đ The lesson reviews the three types of plate boundaries: convergent, divergent, and transform fault, with arrows in a diagram illustrating their relative movements.
- đ The 'Ring of Fire' is highlighted as an area with numerous convergent boundaries, high earthquake activity, and many active volcanoes.
- đïž Convergent boundaries are further classified into three subtypes based on the types of lithosphere involved: oceanic-oceanic, oceanic-continental, and continental-continental.
- đ Oceanic-oceanic convergence involves two oceanic plates where the older, denser plate subducts beneath the younger plate, leading to volcanic island arcs and trenches.
- đ Subduction is the process where a dense oceanic plate moves under another plate due to its higher density, which is influenced by age and temperature.
- đ The term 'destructive boundary' is used because the subducting plate is partially destroyed or melts, contributing to the formation of geological features.
- đ Volcanic island arcs and trenches are key features associated with oceanic-oceanic convergent boundaries, formed due to the melting of the subducting plate.
- đ A simulation is used to visually demonstrate the process of oceanic-oceanic convergence over time, showing the subduction of the older plate and the formation of volcanic island arcs.
Q & A
What is the main focus of Module 5 for grade 10 students?
-Module 5 focuses on convergent boundaries, specifically explaining what happens when different types of crusts collide and the effects of convergent plate boundaries on the Earth's crust.
What are the three types of plate boundaries discussed in the previous lesson?
-The three types of plate boundaries are convergent boundaries, divergent boundaries, and transform fault boundaries.
What is a convergent boundary and why is it also called a collision boundary?
-A convergent boundary is where two plates move towards each other, hence it is also called a collision boundary because of the tendency for the plates to collide.
What are the three types of convergent boundaries based on the interacting lithospheres?
-The three types of convergent boundaries are oceanic-oceanic, oceanic-continental, and continental-continental.
What happens during oceanic-oceanic convergence?
-During oceanic-oceanic convergence, two oceanic slabs converge and one descends beneath the other due to subduction, leading to the formation of a volcanic island arc and a trench.
What is subduction and why does it occur in oceanic-oceanic convergence?
-Subduction is the process where one plate goes under another due to density differences. In oceanic-oceanic convergence, the older, denser oceanic lithosphere undergoes subduction.
What geological features are associated with oceanic-oceanic convergence?
-The geological features associated with oceanic-oceanic convergence include a volcanic island arc, a trench, and earthquakes due to the movement and collision of plates.
Why are convergent boundaries referred to as destructive boundaries?
-Convergent boundaries are called destructive because one part of the lithosphere is destroyed or melts and undergoes subduction during the process.
What is the significance of the Ring of Fire in relation to convergent boundaries?
-The Ring of Fire is significant because it has a high concentration of convergent boundaries, which leads to increased volcanic and earthquake activities.
How does the simulation in the lesson help students understand oceanic-oceanic convergence?
-The simulation visually demonstrates the process of oceanic-oceanic convergence, including subduction, melting of the older lithosphere, and the formation of volcanic island arcs and trenches over time.
Outlines
đ Introduction to Convergent Boundaries
This paragraph introduces the topic of convergent boundaries, which is the focus of Module 5 for Grade 10 students in specific sections. The lesson aims to explain the processes occurring along plate boundaries, with a particular emphasis on convergent boundaries. The instructor reviews the three types of plate boundaries: convergent, divergent, and transform fault, using visual aids to distinguish between them based on plate movements. The importance of understanding these movements is highlighted as it helps to differentiate between the types of boundaries. The paragraph concludes with a mention of the objectives for the lesson, which include explaining the outcomes of different crustal collisions and the effects of convergent boundaries on Earth's crust.
đ Types of Convergent Boundaries
The second paragraph delves into the specifics of convergent boundaries, explaining that they occur when two plates move towards each other, hence the term 'convergent'. It introduces the concept of 'destructive boundary' and hints at its explanation in subsequent content. The paragraph outlines three subtypes of convergent boundaries based on the types of lithosphere involved: oceanic-oceanic, oceanic-continental, and continental-continental. The instructor emphasizes the importance of understanding the differences between these types, which is crucial for comprehending the geological processes that occur at these boundaries.
đ Oceanic-Oceanic Convergence
This paragraph focuses on the oceanic-oceanic convergence, a type of convergent boundary where two oceanic plates interact. The instructor explains the process of subduction, where one oceanic plate, typically the older and denser one, descends beneath the other. Key geological features associated with this process are a volcanic island arc, a trench, and the occurrence of earthquakes. The paragraph also discusses the concept of density in relation to lithosphere types and how it influences the direction of subduction. The instructor uses a cross-sectional diagram to illustrate these concepts and provides a real-world example of a trench, the Mariana Trench, to anchor the theoretical discussion in practical terms.
đ„ Geologic Processes in Oceanic-Oceanic Convergence
The fourth paragraph continues the discussion on oceanic-oceanic convergence, explaining the geologic processes that occur when an old oceanic lithosphere subducts beneath a younger one. As the subducting plate is subjected to high temperatures and pressures, it melts, producing magma that rises to form volcanic island arcs. The paragraph uses a simulation to visually demonstrate these processes over millions of years, showing the formation of trenches and volcanic arcs. The instructor emphasizes the significance of understanding these features and processes, which are key to comprehending the dynamics of convergent boundaries.
Mindmap
Keywords
đĄConvergent Boundary
đĄPlate Tectonics
đĄSubduction
đĄVolcanic Island Arc
đĄTrench
đĄOceanic Lithosphere
đĄContinental Lithosphere
đĄRing of Fire
đĄDivergent Boundary
đĄTransform Fault Boundary
Highlights
Introduction to Module 5 focusing on convergent boundaries for Grade 10 students.
Essential learning competency is to explain processes along plate boundaries.
Objectives include explaining collisions of oceanic and continental crusts, and two continental crusts.
The importance of labeling a figure showing a convergent plate boundary.
Discussing the significant effects of convergent plate boundaries on Earth's crust.
Review of the three types of plate boundaries: convergent, divergent, and transform fault.
Convergent boundaries are where plates move towards each other, divergent where they move apart, and transform fault where they slide past each other.
Visualizing plate movements with GIFs to understand relative movements in different plate boundaries.
Map showing the distribution of different types of plate boundaries, highlighting the Ring of Fire's convergent boundaries.
Definition of convergent plate boundary as a place where two plates move together, also known as a collision or destructive boundary.
Explanation of the three types of convergent boundaries based on lithosphere interaction: oceanic-oceanic, oceanic-continental, and continental-continental.
Detailed discussion on oceanic-oceanic convergence, including subduction and formation of volcanic island arcs and trenches.
Subduction is the process where one plate goes under another due to density differences.
Older oceanic lithosphere is denser and thus more likely to undergo subduction.
Convergent boundaries are destructive because subducted lithosphere melts and is destroyed.
Simulation demonstrating oceanic-oceanic convergence, showing subduction and formation of volcanic island arcs over time.
Volcanic island arcs and trenches are key features of oceanic-oceanic convergence.
Introduction to the effects of convergent boundaries on Earth's crust.
Transcripts
good day everyone i am again mom deya
and for today
we will be discussing module 5 or
the module for week number 5 which is
all about
convergent boundary now this module is
for grade 10 students and if you're
under me if you are from section gold
helium silver nickel and vanity
this video is for you so in this
lesson our most essential learning
competency is
to explain the different processes that
occur along plate boundaries
if you remember last week we discussed
the three different types of plate
boundaries
so for this week we will be discussing
just one of them
which is convergent boundaries
specifically we want to achieve these
objectives
first to explain what happens when
oceanic and continental crust collide
when two oceanic crusts collide and when
two continental crust
collide second
label the figure that shows convergent
plate boundary
and third give the significant effects
of convergent plate boundary on the
earth's
crust
so we will be starting this lesson by
having a review of the three types of
plate boundaries
so here we have a picture this picture
was already shown last time to you
as you can see in this picture there are
different
sets of arrows we have arrows that
are pointing towards each other we also
have arrows that are pointing away from
each other
and we also have arrows that are moving
side by side or sliding past each other
now can you remember the three different
types of plate boundaries
based on these movements
okay so we have
first the convergent boundary which will
be our lesson for today
second the divergent boundary and third
transform fault boundary so as you can
remember
convergent boundaries are plate
boundaries where
the plates are moving towards each other
for the diversion boundary the plates
are moving away from each other
and for transform fault boundary the
plates are moving
or sliding past each other so don't
forget
those movements because they will help
you remember the difference among the
three
so for us to better visualize what
happens in these three types of plate
boundaries
i have here gifs
so here we can see the movements or the
relative movements of the plates in each
type of
plate boundary so again the arrows
show you or show us what are the
relative
movements and right now our
highlight would be convergent boundaries
but before we proceed with the specifics
of this type of plate boundary
let's look at this map so as you can see
this map
combines all the different types of
blade boundaries
we can see the red marks showing
convergent boundaries
we also have white marks showing the
divergent boundaries
and the orange marks showing the
transform
boundaries now what can you notice
okay so as you can see this area which
we call the ring of fire
has lots of convergent boundaries
also this area has lots of earthquake
activities and we also know that this
area's
or this area has lots of volcanoes or
active volcanoes in it
as we have discussed in the previous
weeks
and as you can see also um
most of the divergent and transform
boundaries are
found near each other so right now we
will be discussing convergent
boundaries let's start with the
definition
of a convergent plate boundary
convergent comes from the root word
converge which means
coming together
so again a convergent plate boundary is
a plate boundary where two plates
move together it is sometimes called a
collision boundary or a destructive
boundary now why is it called a
collision boundary
it's very easy to relate collision with
converging because whenever two plates
move towards
each other the tendency is for them to
collide
however the term destructive is a bit
harder to explain
but will be discussed in the next slides
also it has three types and the three
types are based on the type
of litosphere that are interacting with
each
other so remember we have two types of
lithosphere
this was discussed in lesson one or in
module one
we have continental lithosphere and we
have oceanic lithosphere
so as for the three types of convergent
boundaries
we have first oceanic oceanic
second oceanic continental and third
continental continental so it's very
easy to distinguish
one from the other because as you all
know oceanic oceanic
would be a plate boundary consisting of
one oceanic lithosphere and another
oceanic lithosphere
for oceanic continental we have an
oceanic lithosphere
moving towards a continental lithosphere
and for a continental continental we
have a continental lithosphere
moving towards a continental lithosphere
so we will be discussing this deeply
in the next slides
let's start with oceanic oceanic
convergence
the figure you can see below is the
figure shown
in your module this is a cross-sectional
diagram of converging to
oceanic plates what are the important
terms that you can see
in this diagram
okay so you have oceanic crust here we
oceanic lithosphere remember
uh we can interchange crust and
lithosphere in the discussion they are
almost the same and then we have
subducting oceanic lithosphere
we also have melting here we also have a
stenosphere
what specifically happens in an oceanic
oceanic
convergence here two oceanic slabs
converge and one descends beneath the
other
so in filipino it means
why we will be discussing it in a few
minutes
and what are the important geologic
processes or features
to be remembered for this type of
convergence we have
a volcanic island arc we have a trench
and we have an earthquake always
remember
that whenever there is a movement
of plates there would be
an earthquake because even a very slight
movement would cause a release
of energy inside the earth so having
earthquakes is not
really a question here so we will be
focusing more
on the geologic features that would
arise in each type
of convergence okay now what is
subduction again
so subduction is the process of
um one plate going under the other plate
because
of density now can you remember
which plate or which type of lithosphere
is denser than the other
okay that's correct so an oceanic
lithosphere
would be denser than a continental
lithosphere
however if we have two oceanic
lithospheres
which would be denser
would they just go down at the same time
because they are both
dense
the answer is no because definitely in
the diagram that is shown to you
on the screen one would undergo
subduction
and this abduction would have something
to do with the age
of the oceanic crust or the oceanic
lithosphere
okay so always remember that
an older oceanic lithosphere
or an older oceanic crust would
tend to be denser than a younger
oceanic lithosphere so therefore if you
have a young
oceanic lithosphere and you have an old
oceanic lithosphere
the old oceanic lithosphere would
undergo
subduction so didn't
destructive plate boundary
now why is convergence or why is a
convergent boundary a destructive
boundary it's because
if one part of the lithosphere undergoes
subduction
okay that part of the little sphere
would melt
or therefore would be destroyed inside
okay but it's not really entirely
destroyed
it will melt and something will happen
to it
which we can see in the next
picture so this picture
shows us what happens in oceanic oceanic
convergence so here we have
an oceanic lithosphere on the left and
we also have another oceanic lithosphere
on the right
technically the right oceanic
lithosphere should be older because
it's the one undergoing subduction
once it reaches a certain part of the
earth where the temperature is high
enough to melt
it it would melt and that part
would give out magma and that magma
would come out of the lithosphere which
would produce
this volcanic island
arc now the point
where the two oceanic lithospheres met
would be
a trench so anong trench
a trench is a depression
in the earth's lithosphere which marks
the boundary
of two plates so in this
case we have the boundary of the oceanic
lithospheres
in this part bitusila and this would
become a
trench can you remember a
name of a trench that is famous
[Music]
okay so we have the mariana strength the
philippine trench
so marami time trench and usually these
trenches are
located parallel to
a volcanic island arc
so here is another picture of oceanic
oceanic convergence
which was somehow flipped on the other
side
now it would also show the same features
so we have a trench here
and then we have the island arc by the
way this is also another
thing to remember in some
books or in some sources
volcanic island orcs are called island
arcs for oceanic oceanic convergence
when we go to oceanic continental
convergence which is after this
there is a similar geologic feature that
would arise
which they call in the module as
volcanic
island art however in some sources in
other books they call that continental
volcanic arts to distinguish maybe
oceanic oceanic and oceanic continental
now for the case of this module we will
be following the module
they called it volcanic island arcs
both for oceanic oceanic and oceanic
continental
however i will also be introducing the
other terms
just in case
sources so going back
oceanic oceanic convergence we still
have trench we have the
island arcs or the volcanic island arcs
now for you to be able to really
visualize what is happening
through the years i will be showing you
a simulation
okay so let's have a quick run through
of what can be seen in this
simulation we have two tabs the crust
and the plate motion
so we will be doing the plate motion
later but then you can see
here that oceanic crust is
thinner than continental crust so we
have already
discussed that in the previous weeks
so i have the option here to show the
density and the temperature and then
also to
show the labels when i go to plate
motion
okay so we will be choosing the
automatic mode
and then since we are demonstrating
oceanic oceanic convergence i will be
adding
a young oceanic crust on the left side
and the old oceanic crust on the
right side now for us to be able to see
the difference
i will be showing all the labels
and then i will also show seawater para
oceanic and then
we will be choosing conversion it was
already chosen
here
okay so i will also be showing the
temperature as well
because of the color red now if i press
the play button
okay we can see that they possibly
nothing
the old oceanic crust underwent
subduction
okay so this was mentioned a while ago
to you remember
the denser type of lithosphere would
undergo subduction
so if you have oceanic continental
the oceanic would undergo subduction
now if you have oceanic oceanic since
both are dense
the older oceanic lithosphere
would undergo subduction as you can see
in this simulation
okay slolan nathan time elapsed
three million years already
movement
and then notice what happens
particularly in this
part
okay so please focus on this
part
we can see that this subducting
oceanic lithosphere the older oceanic
lithosphere
will start to melt once it reaches a
certain part of the mantle
so as we all know as we go deeper the
temperature becomes
hotter or it becomes higher
so what happens now to this
molten materials so this molten
materials
or the magma will go up
and then afterwards
this would produce something on top
it's 27 million years here and counting
look what happens
and we stopped at 50 million
years now what can you notice on top
of this region what can you see
there are volcanoes and again we call
this volcanoes
volcanic island arcs
so again uh don't forget if we have
uh volcanic island arcs here we also
have
a trench parallel to that
volcanic island arc
so i hope you have understood what
happens in an oceanic oceanic
convergence
so it's now time for us to
go to the actual effects
Voir Plus de Vidéos Connexes
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