Two types of Divergent Plate Boundaries
Summary
TLDRDivergent plate boundaries, where tectonic plates drift apart, are driven by rising convection currents and magma that forms new crust. The script explains two types: continental and oceanic. Oceanic boundaries, exemplified by the mid-ocean ridge, create new oceanic crust, while continental boundaries, like the East African Rift Valley and the Red Sea, showcase the transition from continental to oceanic boundaries. This educational overview from moomoomath and science offers daily insights into the dynamic Earth's crust.
Takeaways
- 🌌 Divergent plate boundaries are where tectonic plates move away from each other, driven by rising convection currents.
- 🌋 These boundaries are characterized by the upward movement of magma, which pushes against the lithosphere and flows laterally beneath it.
- 📚 The lateral flow of magma causes the plates to move apart in opposite directions, creating a gap that is filled with new crust.
- 🏞 New crust formation makes divergent boundaries constructive, as opposed to destructive boundaries where crust is consumed.
- 🗺️ The map of major tectonic plates reveals several divergent boundaries, indicating their global significance.
- 🌊 Oceanic and oceanic divergent boundaries are where two oceanic plates move apart, leading to seafloor spreading.
- 🌐 The mid-ocean ridge, a common example of this type, stretches around the world and can be seen in red on maps.
- 🏝️ The mid-ocean ridge is also visible on land, running through Iceland, demonstrating how it forms new oceanic crust and lithosphere.
- 🏜️ Continental and continental divergent boundaries occur when two continental plates separate, as seen in the East African Rift Valley.
- 🌊 The Red Sea is another example of a continental and continental boundary, formed by the divergence between the African and Arabian plates.
- 🔄 The Red Sea's formation illustrates the transition from a continental and continental to a continental and oceanic plate boundary.
Q & A
What are divergent plate boundaries?
-Divergent plate boundaries occur where two tectonic plates move away from each other, typically above rising convection currents. This movement is facilitated by magma pushing up and flowing laterally beneath the lithosphere.
What causes the plates to move apart at divergent boundaries?
-The rising magma from convection currents pushes up on the bottom of the lithosphere, causing a lateral flow which in turn moves the plates apart in the direction of the flow.
Why are divergent boundaries considered constructive boundaries?
-Divergent boundaries are constructive because new crust is formed as the plates move apart. Molten magma fills the gap, creating new crust and lithosphere.
What are the two major types of divergent boundaries?
-The two major types of divergent boundaries are continental and continental lithosphere boundaries, and oceanic and oceanic lithosphere boundaries.
Where does seafloor spreading primarily occur?
-Seafloor spreading primarily occurs at oceanic and oceanic divergent boundaries, most notably along the mid-ocean ridge.
What is the mid-ocean ridge, and how is it related to divergent boundaries?
-The mid-ocean ridge is a large underwater mountain range formed by the divergence of two oceanic plates. It is where new oceanic crust and lithosphere are created as a result of magma rising and spreading out.
How does the mid-ocean ridge appear on a map of tectonic plates?
-On a map of tectonic plates, the mid-ocean ridge appears as a continuous, often red-colored line that stretches around the world, indicating areas of seafloor spreading.
What is an example of a continental and continental divergent boundary?
-The East African Rift Valley is an example of a continental and continental divergent boundary, where two plates of continental lithosphere are moving away from each other.
How was the Red Sea formed?
-The Red Sea was formed by the divergence between the African plate and the Arabian plate, which started as a continental and continental divergent boundary and transitioned to a continental and oceanic plate boundary.
What is the significance of the Iceland location in relation to divergent boundaries?
-Iceland is significant because it lies on the mid-ocean ridge, which is a divergent boundary where the Eurasian plate and the North American plate are moving apart, allowing for volcanic activity and the creation of new crust.
What can viewers expect from moomoomath and science videos?
-Viewers can expect new math and science videos every day from moomoomath, covering a variety of topics to enhance understanding of various scientific concepts.
Outlines
🌋 Divergent Plate Boundaries Explained
This paragraph delves into the concept of divergent plate boundaries, where tectonic plates move apart from each other. It explains that these boundaries form above rising convection currents, which push magma up from beneath the lithosphere. This magma then flows laterally, causing the plates to move in the direction of the flow. At the boundary, the plates move in opposite directions, creating new crust as they separate. The paragraph distinguishes between two major types of divergent boundaries: continental and oceanic. Oceanic divergent boundaries are exemplified by the mid-ocean ridge, a global feature where seafloor spreading occurs, creating new oceanic crust. Continental divergent boundaries, on the other hand, are illustrated by the East African Rift Valley and the Red Sea, which was formed by the divergence between the African and Arabian plates. The script concludes with an invitation to subscribe to moomoomath for daily educational content.
Mindmap
Keywords
💡Divergent Plate Boundaries
💡Tectonic Plates
💡Convection Currents
💡Lithosphere
💡Constructive Boundaries
💡Magma
💡Mid-Ocean Ridge
💡Seafloor Spreading
💡Continental and Continental Divergent Boundaries
💡East African Rift Valley
💡Red Sea
Highlights
Divergent plate boundaries occur where tectonic plates move away from each other.
These boundaries form above rising convection currents which push magma up on the lithosphere.
Lateral flow of magma beneath the lithosphere causes plates to move in the direction of the flow.
Divergent boundaries are characterized by the movement of plates in opposite directions.
They are constructive boundaries, forming new crust as plates separate.
Molten magma fills the gap between separating plates, creating new crust.
Divergent boundaries can be seen on a map of the major tectonic plates.
There are two major types of divergent boundaries: continental and oceanic.
Oceanic and oceanic divergent boundaries are where two oceanic plates move apart, causing seafloor spreading.
The mid-ocean ridge is a common example of an oceanic divergent boundary.
The mid-Atlantic ridge is visible in red on the map, stretching around the world.
Continental and continental divergent boundaries occur when two continental plates move away from each other.
The East African Rift Valley was created by continental divergent boundaries.
The Red Sea is an example of a boundary formed by the divergence between the African and Arabian plates.
The Red Sea transitioned from a continental to a continental and oceanic plate boundary.
Moomoomath provides daily uploads of math and science videos.
The channel encourages viewers to subscribe and share their content.
Transcripts
welcome to moomoomath and science in
divergent plate boundaries divergent
plate boundaries occur where huge
tectonic plates move away from one
another
this occurs above rising convection
currents the rising magma pushes up on
the bottom of the lithosphere and flows
laterally beneath it this lateral flow
causes the plates to move in the
direction of the flow at the plate
boundary the two plates move in opposite
directions divergent boundaries are
constructive boundaries because new
crust is formed as the plates move apart
molten magma fills in the gap and
creates new crust if you look at the map
of the major tectonic plates you can see
several divergent plate boundaries there
are two major types of divergent
boundaries continental and continental
lithosphere and oceanic and oceanic
lithosphere oceanic and oceanic
divergent boundaries occur where two
oceanic plates move away from one
another this is where seafloor spreading
takes place the most common example is
the mid-ocean ridge which stretches
around the world the mid-ocean ridge can
be seen here in red divergent boundaries
are constructive boundaries because the
rising magma creates new oceanic crust
and lithosphere the mid-ocean ridge runs
right through Iceland here's what it
looks like on land imagine this same
formation underwater continental and
continental divergent boundaries occur
when two plates of continental
lithosphere move away from one another
as the magma rises new Liz's fear is
created the East African Rift Valley was
created when continental and continental
divergent boundaries moved away from
each other the Red Sea is another
example the Red Sea was formed by the
divergence between the African plate and
the Arabian plate the rift transitioned
eventually from a continental and
continental to a continental and oceanic
plate
boundary I hope that helps with
divergent boundaries thanks for watching
and moomoomath uploads a new math and
science video every day please subscribe
and share
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