Vedel si, že sa krajina okolo teba neustále mení? Hory,... Show more
Geografia
Slovenský jazyk
Angličtina
MatematikaSign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
20
•
Updated Mar 16, 2026
•
Ako sa mení povrch Zeme?
1 / 6
Základy premien zemského povrchu
Povrch Zeme nie je stále rovnaký - neustále sa mení! Tieto zmeny sa dejú veľmi pomaly, trvajú tisíce až milióny rokov. Spôsobujú ich rôzne prírodné sily, ktoré pracujú ako neviditeľní "stavbári" našej planéty.
Aby si tomu dobre rozumel, musíš poznať pár kľúčových pojmov. Vonkajšie sily pôsobia zvonku - sú to voda, vietor a ľadovce, ktoré povrch obrusujú a prenášajú materiál. Vnútorné sily prichádzajú z hĺbky Zeme - hlavne sopky a zemetrasenia, ktoré dvíhajú a lámu zemský povrch.
Tri najdôležitejšie procesy, ktoré musíš vedieť, sú: zvetrávanie (skaly sa rozpadajú), erózia (materiál sa odnáša) a usadzovanie (materiál sa niekde ukladá). Tieto procesy spolupracujú a vytvárajú všetky krajinné útvary, ktoré poznáš.
Tip: Predstav si to ako recykláciu - príroda neustále "recykluje" horniny a vytvára z nich nové tvary krajiny!
Ako fungujú vonkajšie sily
Voda je najsilnejšou vonkajšou silou. Dážď zmýva pôdu, rieky vytvárajú údolia a more obrusuje pobrežie. Rieka Váh napríklad vytvorila svoje údolie presne takto - voda s kamienkami funguje ako brúsny papier.
Mráz je tiež veľmi účinný. Keď sa voda dostane do puklín v skale a zamrzne, zväčší sa a roztrhne skalu na kúsky. Je to ako keby si naplnil fľašu vodou a nechal ju zamrznúť - fľaša popraská!
Vietor prenáša piesok a prach, najmä na púšťach vytvára pieskové duny. Ľadovce fungujú ako obrovské pomalé buldozéry - vyhĺbili napríklad tatranské plesá a doliny. Dnes už v Tatrách ľadovce nemáme, ale ich dielo stále obdivujeme.
Zaujímavosť: Voda je jedna z mála látok, ktorá sa pri zamrznutí zväčší o 9% - preto dokáže rozbiť aj tie najtvrdšie skaly!
Vnútorné sily a ich pôsobenie
Sopky sú ako dvierka do vnútra Zeme. Keď vybuchnú, z hĺbky vystupuje horúca láva, popol a plyny. Láva po stuhnutí vytvára nové horniny a môže postaviť celé hory.
Na Slovensku už aktívne sopky nemáme, ale ich pozostatky vidíš všade. Štiavnické vrchy či Poľana sú staré vyhasnuté sopky. Zemetrasenia spôsobujú náhle otrasy, ktoré môžu popraskať zem alebo zdvihnúť niektoré jej časti.
Teraz si pozrime, ako prebieha celý cyklus premien. Najprv príde zvetrávanie - skaly sa rozpadnú mechanicky (mráz, teplo) alebo chemicky (kyseliny v daždi). Potom erózia - voda alebo vietor odnáša rozpadnutý materiál. Nakoniec usadzovanie - materiál sa uloží niekde inde.
Pamätaj si: Tieto tri kroky - zvetrávanie, erózia, usadzovanie - sú základ všetkých premien povrchu!
Praktické príklady z každodenného života
Pozrime si, ako rieka vytvára údolie. Voda tečie z kopca, unáša kamienky a piesok, ktoré obrusujú dno ako brúsny papier. Postupne sa koryto prehlbuje a rozširuje - takto vzniká riečne údolie.
Pri mrazovom zvetrálí sa voda dostane do pukliny v skale. V noci zamrzne a zväčší sa, čím tlačí na steny pukliny. Keď sa to opakuje, skala sa nakoniec rozpadne.
Vznik sopky je ako otvorenie ventilu. Hlboko pod zemou je roztavená magma, ktorá hľadá cestu von. Keď sa dostane na povrch, stáva sa z niej láva a spolu s popolom sa hromadí okolo miesta výbuchu.
Tip na test: Nezabudni, že všetky tieto procesy trvajú tisíce až milióny rokov - príroda má vždy dostatok času!
Dôležité poznatky a tipy na skúšanie
Čas je kľúčový - všetky zmeny sa dejú neuveriteľne pomaly. Často spolupracuje viac síl naraz - rieka obrusuje údolie, ale mráz pomáha rozbíjať skaly na brehoch.
Pre test si zapamätaj rozdelenie: vonkajšie sily (voda, vietor, ľad) versus vnútorné sily (sopky, zemetrasenia). Každá má iné účinky na krajinu.
Nezabudni na tri hlavné kroky premien: zvetrávanie → erózia → usadzovanie. Vedz uviesť aspoň jeden príklad pre každý typ sily - napríklad rieka Váh pre vodu, Tatranské plesá pre ľadovce.
Skúšobná otázka: Ako mráz rozruší skalu? Odpoveď: Voda v pukline zamrzne, zväčší sa a roztrhne skalu!
Zhrnutie na záver
Povrch Zeme sa neustále mení vďaka vonkajším a vnútorným silám. Vonkajšie sily (voda, vietor, ľadovce) povrch obrusujú, vnútorné sily (sopky, zemetrasenia) ho dvíhajú a lámu.
Základné procesy sú zvetrávanie, erózia a usadzovanie - spolu tvoria nekonečný kolobeh premien. Zmeny trvajú milióny rokov, takže to, čo vidíš dnes, je výsledok dlhodobej práce prírody.
Vďaka týmto silám vznikajú všetky krajinné útvary - od najvyšších hôr až po najhlbšie údolia. Pre skúšku si zapamätaj aspoň dva príklady vonkajších a vnútorných síl plus dokáž vysvetliť tri základné procesy.
Finálny tip: Keď sa budeš prechádzať v prírode, skús si predstaviť, ako tieto sily formovali krajinu okolo teba - bude ti to pomôcť lepšie si zapamätať učivo!
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?
You can download the app from Google Play Store and Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
Most popular content in Geografia
Most popular content
Can't find what you're looking for? Explore other subjects.
Students love us — and so will you.
4.6/5
App Store
4.7/5
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 Knowunity AI. 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 Knowunity AI. 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
Ako sa mení povrch Zeme?
Vedel si, že sa krajina okolo teba neustále mení? Hory, rieky a údolia, ktoré vidíš, vznikali milióny rokov a stále sa transformujú vďaka rôznym prírodným silám. Poďme si spolu objasniť, ako fungujú tieto úžasné procesy, ktoré formujú náš svet.
Základy premien zemského povrchu
Povrch Zeme nie je stále rovnaký - neustále sa mení! Tieto zmeny sa dejú veľmi pomaly, trvajú tisíce až milióny rokov. Spôsobujú ich rôzne prírodné sily, ktoré pracujú ako neviditeľní "stavbári" našej planéty.
Aby si tomu dobre rozumel, musíš poznať pár kľúčových pojmov. Vonkajšie sily pôsobia zvonku - sú to voda, vietor a ľadovce, ktoré povrch obrusujú a prenášajú materiál. Vnútorné sily prichádzajú z hĺbky Zeme - hlavne sopky a zemetrasenia, ktoré dvíhajú a lámu zemský povrch.
Tri najdôležitejšie procesy, ktoré musíš vedieť, sú: zvetrávanie (skaly sa rozpadajú), erózia (materiál sa odnáša) a usadzovanie (materiál sa niekde ukladá). Tieto procesy spolupracujú a vytvárajú všetky krajinné útvary, ktoré poznáš.
Tip: Predstav si to ako recykláciu - príroda neustále "recykluje" horniny a vytvára z nich nové tvary krajiny!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Ako fungujú vonkajšie sily
Voda je najsilnejšou vonkajšou silou. Dážď zmýva pôdu, rieky vytvárajú údolia a more obrusuje pobrežie. Rieka Váh napríklad vytvorila svoje údolie presne takto - voda s kamienkami funguje ako brúsny papier.
Mráz je tiež veľmi účinný. Keď sa voda dostane do puklín v skale a zamrzne, zväčší sa a roztrhne skalu na kúsky. Je to ako keby si naplnil fľašu vodou a nechal ju zamrznúť - fľaša popraská!
Vietor prenáša piesok a prach, najmä na púšťach vytvára pieskové duny. Ľadovce fungujú ako obrovské pomalé buldozéry - vyhĺbili napríklad tatranské plesá a doliny. Dnes už v Tatrách ľadovce nemáme, ale ich dielo stále obdivujeme.
Zaujímavosť: Voda je jedna z mála látok, ktorá sa pri zamrznutí zväčší o 9% - preto dokáže rozbiť aj tie najtvrdšie skaly!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Vnútorné sily a ich pôsobenie
Sopky sú ako dvierka do vnútra Zeme. Keď vybuchnú, z hĺbky vystupuje horúca láva, popol a plyny. Láva po stuhnutí vytvára nové horniny a môže postaviť celé hory.
Na Slovensku už aktívne sopky nemáme, ale ich pozostatky vidíš všade. Štiavnické vrchy či Poľana sú staré vyhasnuté sopky. Zemetrasenia spôsobujú náhle otrasy, ktoré môžu popraskať zem alebo zdvihnúť niektoré jej časti.
Teraz si pozrime, ako prebieha celý cyklus premien. Najprv príde zvetrávanie - skaly sa rozpadnú mechanicky (mráz, teplo) alebo chemicky (kyseliny v daždi). Potom erózia - voda alebo vietor odnáša rozpadnutý materiál. Nakoniec usadzovanie - materiál sa uloží niekde inde.
Pamätaj si: Tieto tri kroky - zvetrávanie, erózia, usadzovanie - sú základ všetkých premien povrchu!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Praktické príklady z každodenného života
Pozrime si, ako rieka vytvára údolie. Voda tečie z kopca, unáša kamienky a piesok, ktoré obrusujú dno ako brúsny papier. Postupne sa koryto prehlbuje a rozširuje - takto vzniká riečne údolie.
Pri mrazovom zvetrálí sa voda dostane do pukliny v skale. V noci zamrzne a zväčší sa, čím tlačí na steny pukliny. Keď sa to opakuje, skala sa nakoniec rozpadne.
Vznik sopky je ako otvorenie ventilu. Hlboko pod zemou je roztavená magma, ktorá hľadá cestu von. Keď sa dostane na povrch, stáva sa z niej láva a spolu s popolom sa hromadí okolo miesta výbuchu.
Tip na test: Nezabudni, že všetky tieto procesy trvajú tisíce až milióny rokov - príroda má vždy dostatok času!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Dôležité poznatky a tipy na skúšanie
Čas je kľúčový - všetky zmeny sa dejú neuveriteľne pomaly. Často spolupracuje viac síl naraz - rieka obrusuje údolie, ale mráz pomáha rozbíjať skaly na brehoch.
Pre test si zapamätaj rozdelenie: vonkajšie sily (voda, vietor, ľad) versus vnútorné sily (sopky, zemetrasenia). Každá má iné účinky na krajinu.
Nezabudni na tri hlavné kroky premien: zvetrávanie → erózia → usadzovanie. Vedz uviesť aspoň jeden príklad pre každý typ sily - napríklad rieka Váh pre vodu, Tatranské plesá pre ľadovce.
Skúšobná otázka: Ako mráz rozruší skalu? Odpoveď: Voda v pukline zamrzne, zväčší sa a roztrhne skalu!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Zhrnutie na záver
Povrch Zeme sa neustále mení vďaka vonkajším a vnútorným silám. Vonkajšie sily (voda, vietor, ľadovce) povrch obrusujú, vnútorné sily (sopky, zemetrasenia) ho dvíhajú a lámu.
Základné procesy sú zvetrávanie, erózia a usadzovanie - spolu tvoria nekonečný kolobeh premien. Zmeny trvajú milióny rokov, takže to, čo vidíš dnes, je výsledok dlhodobej práce prírody.
Vďaka týmto silám vznikajú všetky krajinné útvary - od najvyšších hôr až po najhlbšie údolia. Pre skúšku si zapamätaj aspoň dva príklady vonkajších a vnútorných síl plus dokáž vysvetliť tri základné procesy.
Finálny tip: Keď sa budeš prechádzať v prírode, skús si predstaviť, ako tieto sily formovali krajinu okolo teba - bude ti to pomôcť lepšie si zapamätať učivo!
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?
You can download the app from Google Play Store and Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
2
Smart Tools NEW
Transform this note into: ✓ 50+ Practice Questions ✓ Interactive Flashcards ✓ Full Mock Exam ✓ Essay Outlines
Mock Exam
Quiz
Flashcards
Essay
Most popular content in Geografia
Most popular content
Can't find what you're looking for? Explore other subjects.
Students love us — and so will you.
4.6/5
App Store
4.7/5
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 Knowunity AI. 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 Knowunity AI. 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