Explanation: Constructive plate boundaries are when there are two plates moving apart from each other. Destructive plate boundaries are when oceanic and continental plates move together. In these places, the oceanic plate is forced, or subducted, under the continental plate.
What happens at a destructive plate boundary?
At destructive plate margins, subduction zones and ocean trenches will be formed. At a destructive boundary the plates are moving towards each other. This usually involves a continental plate and an oceanic plate. The oceanic plate is denser than the continental plate.
Do destructive plate boundaries cause volcanoes or earthquakes?
The magma then forces its way up to the side of the plate boundary to form a volcano. Do earthquakes occur at destructive plate boundaries? A destructive plate margin usually involves an oceanic plate and a continental plate. The plates move towards one another and this movement can cause earthquakes.
Is Krakatoa on a constructive or destructive plate boundary?
Krakatoa is a volcano in Indonesia that lies at the convergent boundary between the Eurasian and Indo-Australian tectonic plates. It was formed sometime within the past million years, when the two plates collided and the Indo-Australian plate began sliding under the Eurasian plate. The volcano is famous for its major eruption in 1883, which killed 36,000 people and was one of the deadliest ...
What happens at a destructive plate boundary BV?
Destructive Plate Boundaries (2018 Q3C) A plate boundary is how the earth’s crust is broken into plates, where 2 plates meet is known as a plate boundary. Different plate boundaries exist as plate boundaries move by convection currents. Land is usually destroyed at destructive plate boundaries. At continental-continental destructive plate ...
What happens when two continental plates collide?
What happens when the plates move apart?
How does magma escape from the Earth?
Why do oceanic plates move towards each other?
How do earthquakes affect people?
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About this website
What is constructive and destructive plates?
They are called constructive plates because when they move apart, magma rises up in the gap- this forms volcanoes and eventually new crust. One example is the Mid-Atlantic Ridge, where the gap can be found in Thingvellir, Iceland. Destructive plate boundaries are when oceanic and continental plates move together.
What are destructive boundaries?
At a destructive plate boundary (also called convergent boundaries) two plates move towards another. One plate is then pushed underneath the other. (It is the heavier plate that is forced beneath the lighter plate). The point at which one plate is forced beneath the other is called the subduction zone.
What are constructive plate boundaries?
Constructive plate boundary volcanoes At constructive plate boundaries, the tectonic plates are moving away from one another. The Earth's crust is pulled apart to create a new pathway for rising hot magma to flow on to the surface. Volcanoes can sometimes form in these setting; one example is Iceland.
What are destructive plate boundaries called?
Convergent plate boundaries A convergent plate boundary , also known as a destructive plate boundary , usually involves an oceanic plate and a continental plate. The plates move towards one another and this movement can cause earthquakes. As the plates collide, the oceanic plate is forced beneath the continental plate.
Where are the destructive plate boundaries?
Destructive plate margins occur where an oceanic and continental plate move towards each other. Examples below include the Pacific Plate and Eurasian Plate and the Nazca Plate and the South American Plate.
How many destructive plate boundaries are there?
Most seismic activity occurs at three types of plate boundaries—divergent, convergent, and transform. As the plates move past each other, they sometimes get caught and pressure builds up.
Is divergent constructive or destructive?
There are three main types of plate boundary. These are convergent (destructive), divergent (constructive) and conservative. The direction of plate movement dictates the features and processes associated with each tectonic plate boundary.
How do destructive plate boundaries cause earthquakes?
Destructive plate margins The plates move towards one another and this movement can cause earthquakes. As the plates collide, the oceanic plate is forced beneath the continental plate. This is known as subduction . This happens because the oceanic plate is denser (heavier) than the continental plate.
Is the transform boundary destructive or constructive?
Transform faults connect the end of one plate boundary to the end of another plate boundary, so there are potentially three types of transform fault: those that link two segments of a constructive boundary. those that link two destructive boundaries. those that link a destructive boundary with a constructive boundary.
What is the difference between destructive and collision plate boundaries?
Destructive (or convergent) is where the two plate push into each other, but one - the oceanic plate - is heavier and more dense, so is pushed under the lighter continental plate, this is known as subduction. Collision are when two plates push together, as above, but they're both continental plates.
Where are constructive plate boundaries found?
Constructive (tensional) plate margins occur where plates move apart. Examples below include the South American Plate and African Plate and the Eurasian Plate and North American Plate. Constructive boundaries are mainly located under the sea, e.g. the Mid Atlantic Ridge.
Why are convergent boundaries destructive?
At convergent plate boundaries, oceanic crust is often forced down into the mantle where it begins to melt. Magma rises into and through the other plate, solidifying into granite, the rock that makes up the continents. Thus, at convergent boundaries, continental crust is created and oceanic crust is destroyed.
What are the 4 types of plate boundaries?
Plate Boundaries and Hotspot DemonstrationDivergent Plate Boundary. Volcanic eruptions and shallow earthquakes are common where plates rip apart.Convergent Plate Boundary. ... Transform Plate Boundary. ... Hotspot.
What hazards occur at destructive plate boundaries?
Some of the most destructive natural hazards that occur on Earth—earthquakes, tsunamis and volcanic eruptions—are associated with tectonic plate boundaries.
Are divergent plate boundaries destructive?
Divergent boundary (Constructive) Along these boundaries, lava spews from long fissures and geysers spurt superheated water. Frequent earthquakes strike along the rift. Beneath the rift, magma—molten rock—rises from the mantle.
Why are convergent boundaries destructive?
At convergent plate boundaries, oceanic crust is often forced down into the mantle where it begins to melt. Magma rises into and through the other plate, solidifying into granite, the rock that makes up the continents. Thus, at convergent boundaries, continental crust is created and oceanic crust is destroyed.
Conservative plate margin - Plate tectonics - CCEA - BBC Bitesize
At conservative plate margins, fault lines will be formed. These are plate boundaries where two plate are either slipping past each other in opposite directions or at different rates in the same ...
Destructive plate margin - Plate tectonics - CCEA - BBC Bitesize
At destructive plate margins, subduction zones and ocean trenches will be formed. At a destructive boundary the plates are moving towards each other. This usually involves a continental plate and ...
What happens when two continental plates collide?
If two continental plates collide, neither can sink and so the land buckles upwards to form fold mountains. This is called a collision margin. Earthquakes can occur at collision margins.
What happens when the plates move apart?
At a constructive plate margin the plates move apart from one another. When this happens the magma from the mantle rises up to make (or construct) new land in the form of a shield volcano. The movement of the plates over the mantle can cause earthquakes.
How does magma escape from the Earth?
The pressure of the magma builds up beneath the Earth's surface. The magma escapes through weaknesses in the rock and rises up through a composite volcano. The volcanic eruptions are often violent, with lots of steam, gas and ash.
Why do oceanic plates move towards each other?
The plates move towards one another and this movement can cause earthquakes. As the plates collide, the oceanic plate is forced beneath the continental plate. This is known as subduction. This happens because the oceanic plate is denser (heavier) than the continental plate.
How do earthquakes affect people?
Earthquakes and volcanic eruptions affect people all over the world. They are caused by the movement of tectonic plates. Tectonic hazards can destroy buildings, infrastructure and cause deaths.
What are the three main types of plate boundaries?
There are three main types of plate boundary. These are convergent (destructive), divergent (constructive) and conservative. The direction of plate movement dictates the features and processes associated with each tectonic plate boundary. A map to show the major tectonic plates and their direction of movement.
Where are the North American and Pacific plates sliding past each other?
It is possible to see the boundary between plates along a conservative margin. An example of this is the San Andreas fault in California. This is where the North American and Pacific plates slide past each other.
What is the name of the island chain formed by the oceanic plates?
Where two oceanic plates converge the denser crust subducts the other. This creates a trench. As the oceanic plate descends it melts, and the magma rises forming a volcanic island chain, known as an island arc. The north-west Pacific Ring of Fire has a series of island arcs including the Aleutian Islands.
What happens when an oceanic plate converges with a continental plate?
As an oceanic plate converges on a continental plate the sedimentary rock formed on top of the ocean crust folds upwards along the leading edge of the continental plate. In addition to this, the continental crust also lifts and buckles and magma is injected from the asthenosphere. This process forms fold mountains of which the Andes and the Rockies are examples.
Why do conservative plates slide past each other?
This is because plates do not pass each other smoothly; friction causes resistance. As pressure builds the crust can fracture releasing energy as earthquakes.
How deep is subduction?
Subduction leads to the formation of an ocean trench. These trenches can be up to 11,000m deep. They mark the point where the oceanic plate enters the asthenosphere. As it does this the continental crust buckles forming the trench.
What is the process that forms fold mountains?
This process forms fold mountains of which the Andes and the Rockies are examples . As the oceanic crust subducts the continental crust it melts. The magma rises as it is less dense than the material around it. Large intrusions of magma create uplift, further contributing to the formation of fold mountains.
What happens when two continental plates collide?
If two continental plates collide, neither can sink and so the land buckles upwards to form fold mountains. This is called a collision margin. Earthquakes can occur at collision margins.
What happens when the plates move apart?
At a constructive plate margin the plates move apart from one another. When this happens the magma from the mantle rises up to make (or construct) new land in the form of a shield volcano. The movement of the plates over the mantle can cause earthquakes.
How does magma escape from the Earth?
The pressure of the magma builds up beneath the Earth's surface. The magma escapes through weaknesses in the rock and rises up through a composite volcano. The volcanic eruptions are often violent, with lots of steam, gas and ash.
Why do oceanic plates move towards each other?
The plates move towards one another and this movement can cause earthquakes. As the plates collide, the oceanic plate is forced beneath the continental plate. This is known as subduction. This happens because the oceanic plate is denser (heavier) than the continental plate.
How do earthquakes affect people?
Earthquakes and volcanic eruptions affect people all over the world. They are caused by the movement of tectonic plates. Tectonic hazards can destroy buildings, infrastructure and cause deaths.