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14 Dec 2025

2 pages

Understanding Tectonic Plates and Their Impact

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Will

@will_07

Ever wondered why earthquakes and volcanoes happen in certain places... Show more

# Tectonic Plates

Earth's Surface:

The Earth's surface is made up of two types

- Oceanic crust- found underneath the oceans. It's denser

Tectonic Plates and Earth's Structure

Think of Earth's surface like a cracked eggshell - it's made up of huge pieces that are always slowly moving. These pieces are called tectonic plates, and they sit on top of two different types of crust.

Oceanic crust lies beneath our oceans and is much denser than the other type. This density means it can be pushed down or "subducted" when plates collide. Continental crust, on the other hand, sits under our land masses and continents - it's generally much older and tougher to destroy.

Here's something fascinating: whilst earthquakes happen at all types of plate boundaries, volcanoes are much pickier. They only form at constructive and destructive plate margins - never at conservative ones.

Quick Tip: Remember this pattern - earthquakes are everywhere plates meet, but volcanoes are selective about where they appear!

Constructive Plate Margins

At constructive plate margins, the plates are literally pulling apart from each other like a slow-motion split. When this happens, hot magma from deep inside Earth rises up to fill the gap, creating new land and forming shield volcanoes.

The constant movement of these plates sliding over the mantle creates friction and tension. This movement is what triggers earthquakes at these boundaries, even though the plates are moving away from each other rather than crashing together.

Destructive Plate Margins

Destructive plate margins are where the real drama happens - usually between an oceanic plate and a continental plate moving towards each other. When they collide, the denser oceanic plate gets forced underneath the continental plate in a process called subduction.

As the oceanic plate sinks into the hot mantle, it melts and forms magma. This magma builds up pressure until it forces its way up through the rock above, creating composite volcanoes. The collision and subduction process also generates powerful earthquakes.

Conservative Plate Margins

Conservative plate margins might sound harmless, but they're actually responsible for some of the most destructive earthquakes on Earth. Here, plates slide past each other or move at different speeds, creating massive friction.

The plates often get stuck due to this friction, but the forces keep building up pressure. When they finally break free, they release enormous amounts of energy as earthquakes. These earthquakes can be particularly devastating because they occur close to Earth's surface, and importantly, no volcanoes form at these boundaries.

# Tectonic Plates

Earth's Surface:

The Earth's surface is made up of two types

- Oceanic crust- found underneath the oceans. It's denser


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You can download the app from Google Play Store and Apple App Store.

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Most popular content: Tectonic Plates

Most popular content in Geography

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Students love us — and so will you.

4.9/5

App Store

4.8/5

Google Play

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

Best app on earth! no words because it’s too good

Thomas R

iOS user

Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

Best app on earth! no words because it’s too good

Thomas R

iOS user

Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user

 

Geography

177

14 Dec 2025

2 pages

Understanding Tectonic Plates and Their Impact

user profile picture

Will

@will_07

Ever wondered why earthquakes and volcanoes happen in certain places around the world? It's all down to massive chunks of rock called tectonic plates that make up Earth's surface, constantly moving and interacting with each other.

# Tectonic Plates

Earth's Surface:

The Earth's surface is made up of two types

- Oceanic crust- found underneath the oceans. It's denser

Sign up to see the contentIt's free!

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Improve your grades

Join milions of students

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Tectonic Plates and Earth's Structure

Think of Earth's surface like a cracked eggshell - it's made up of huge pieces that are always slowly moving. These pieces are called tectonic plates, and they sit on top of two different types of crust.

Oceanic crust lies beneath our oceans and is much denser than the other type. This density means it can be pushed down or "subducted" when plates collide. Continental crust, on the other hand, sits under our land masses and continents - it's generally much older and tougher to destroy.

Here's something fascinating: whilst earthquakes happen at all types of plate boundaries, volcanoes are much pickier. They only form at constructive and destructive plate margins - never at conservative ones.

Quick Tip: Remember this pattern - earthquakes are everywhere plates meet, but volcanoes are selective about where they appear!

Constructive Plate Margins

At constructive plate margins, the plates are literally pulling apart from each other like a slow-motion split. When this happens, hot magma from deep inside Earth rises up to fill the gap, creating new land and forming shield volcanoes.

The constant movement of these plates sliding over the mantle creates friction and tension. This movement is what triggers earthquakes at these boundaries, even though the plates are moving away from each other rather than crashing together.

Destructive Plate Margins

Destructive plate margins are where the real drama happens - usually between an oceanic plate and a continental plate moving towards each other. When they collide, the denser oceanic plate gets forced underneath the continental plate in a process called subduction.

As the oceanic plate sinks into the hot mantle, it melts and forms magma. This magma builds up pressure until it forces its way up through the rock above, creating composite volcanoes. The collision and subduction process also generates powerful earthquakes.

Conservative Plate Margins

Conservative plate margins might sound harmless, but they're actually responsible for some of the most destructive earthquakes on Earth. Here, plates slide past each other or move at different speeds, creating massive friction.

The plates often get stuck due to this friction, but the forces keep building up pressure. When they finally break free, they release enormous amounts of energy as earthquakes. These earthquakes can be particularly devastating because they occur close to Earth's surface, and importantly, no volcanoes form at these boundaries.

# Tectonic Plates

Earth's Surface:

The Earth's surface is made up of two types

- Oceanic crust- found underneath the oceans. It's denser

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

We thought you’d never ask...

What is the Knowunity AI companion?

Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.

Where can I download the Knowunity app?

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Is Knowunity really free of charge?

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Most popular content: Tectonic Plates

Most popular content in Geography

Most popular content

Can't find what you're looking for? Explore other subjects.

Students love us — and so will you.

4.9/5

App Store

4.8/5

Google Play

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

Best app on earth! no words because it’s too good

Thomas R

iOS user

Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

Best app on earth! no words because it’s too good

Thomas R

iOS user

Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user