Maths
Chemistry
Biology
English Language
History
Responding to change (a2 only)
Infection and response
Homeostasis and response
Energy transfers (a2 only)
Cell biology
Organisms respond to changes in their internal and external environments (a-level only)
Biological molecules
Organisation
Substance exchange
Bioenergetics
Genetic information & variation
Inheritance, variation and evolution
Genetics & ecosystems (a2 only)
Ecology
Cells
Show all topics
Britain & the wider world: 1745 -1901
1l the quest for political stability: germany, 1871-1991
The cold war
Inter-war germany
Medieval period: 1066 -1509
2d religious conflict and the church in england, c1529-c1570
2o democracy and nazism: germany, 1918-1945
1f industrialisation and the people: britain, c1783-1885
1c the tudors: england, 1485-1603
2m wars and welfare: britain in transition, 1906-1957
World war two & the holocaust
2n revolution and dictatorship: russia, 1917-1953
2s the making of modern britain, 1951-2007
World war one
Britain: 1509 -1745
Show all topics
29
•
12 Dec 2025
•
raniya
@raniya
Ecosystems are fascinating communities where plants, animals, and their environment... Show more
Think of an ecosystem as nature's neighbourhood - it's where plants and animals live together and interact with everything around them, including soil, atmosphere, and solar energy. It's like a giant web where everything is connected!
The whole system works brilliantly together. Solar radiation powers photosynthesis in plants, rain provides essential water, and soil delivers nutrients through plant roots. When ecosystems are really massive, like entire rainforests or deserts, we call them biomes.
A natural ecosystem is one that humans haven't messed about with - it's nature doing its own thing perfectly. The environment itself is split into two parts: the non-living bits (rocks, soil, air) and the living community (all the creatures, including us).
Quick Tip: Remember that ecosystems are all about relationships - nothing survives alone in nature!
Deserts might seem impossible to live in, but they're home to some of nature's most clever survivors! These dry areas get less than 250mm of rain yearly and cover a third of Earth's land surface, from North Africa to Australia.
Camels are desert legends with their ability to drink 10 litres in one go, massive feet for walking on sand, and protective eyelashes. Kangaroos have their own cooling tricks - they lick their forearms and dig into cool sand during scorching days.
The fennec fox stays cool by being nocturnal and using its huge ears to release heat, whilst rattlesnakes rely on camouflaged skin and burrowing underground. Even cacti are survival experts with water-storing stems, widespread roots, and spines that reduce water loss.
Remember: Every desert adaptation is about one thing - saving and finding water!
Tropical rainforests are like nature's skyscrapers, found mainly within 5 degrees of the equator in places like the Amazon. The equatorial climate keeps things hot and wet year-round, with afternoon downpours being totally normal.
These forests have distinct layers, each with its own personality. The emergent layer towers above everything else, whilst the thick canopy below blocks most sunlight. Trees grow tall and thin with buttress roots for support, and lianas (woody vines) climb desperately towards the light.
Because so little light reaches the forest floor, there's hardly any undergrowth down there. It's quite dark and mysterious! The whole system is designed around the fierce competition for sunlight.
Fun Fact: The canopy layer is so thick that it can take a raindrop 10 minutes to reach the ground!
Animals in tropical rainforests have developed some seriously impressive skills to thrive in this green maze. Spider monkeys are the ultimate acrobats - their long limbs help them swing up to 40 feet in one go, and their strong tail works like an extra arm for grabbing food.
Red-eyed tree frogs have sticky pads on their toes that work like natural climbing gear, letting them scale any surface with ease. Their bright colours might seem silly, but they're perfectly camouflaged against the colourful rainforest backdrop.
Every adaptation here is about mastering movement and staying hidden. In a forest where everything is vertical and competition is fierce, being able to climb, swing, and blend in can mean the difference between dinner and becoming dinner!
Top Tip: Most rainforest animals live in the trees - the forest floor is surprisingly quiet compared to the busy canopy above!
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.
You can download the app from Google Play Store and Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
Quotes from every main character
English LiteratureApp Store
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
raniya
@raniya
Ecosystems are fascinating communities where plants, animals, and their environment work together like pieces of a puzzle. From scorching deserts to lush tropical rainforests, each ecosystem has developed amazing adaptations that help life survive in even the harshest conditions.
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Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Think of an ecosystem as nature's neighbourhood - it's where plants and animals live together and interact with everything around them, including soil, atmosphere, and solar energy. It's like a giant web where everything is connected!
The whole system works brilliantly together. Solar radiation powers photosynthesis in plants, rain provides essential water, and soil delivers nutrients through plant roots. When ecosystems are really massive, like entire rainforests or deserts, we call them biomes.
A natural ecosystem is one that humans haven't messed about with - it's nature doing its own thing perfectly. The environment itself is split into two parts: the non-living bits (rocks, soil, air) and the living community (all the creatures, including us).
Quick Tip: Remember that ecosystems are all about relationships - nothing survives alone in nature!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Deserts might seem impossible to live in, but they're home to some of nature's most clever survivors! These dry areas get less than 250mm of rain yearly and cover a third of Earth's land surface, from North Africa to Australia.
Camels are desert legends with their ability to drink 10 litres in one go, massive feet for walking on sand, and protective eyelashes. Kangaroos have their own cooling tricks - they lick their forearms and dig into cool sand during scorching days.
The fennec fox stays cool by being nocturnal and using its huge ears to release heat, whilst rattlesnakes rely on camouflaged skin and burrowing underground. Even cacti are survival experts with water-storing stems, widespread roots, and spines that reduce water loss.
Remember: Every desert adaptation is about one thing - saving and finding water!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Tropical rainforests are like nature's skyscrapers, found mainly within 5 degrees of the equator in places like the Amazon. The equatorial climate keeps things hot and wet year-round, with afternoon downpours being totally normal.
These forests have distinct layers, each with its own personality. The emergent layer towers above everything else, whilst the thick canopy below blocks most sunlight. Trees grow tall and thin with buttress roots for support, and lianas (woody vines) climb desperately towards the light.
Because so little light reaches the forest floor, there's hardly any undergrowth down there. It's quite dark and mysterious! The whole system is designed around the fierce competition for sunlight.
Fun Fact: The canopy layer is so thick that it can take a raindrop 10 minutes to reach the ground!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Animals in tropical rainforests have developed some seriously impressive skills to thrive in this green maze. Spider monkeys are the ultimate acrobats - their long limbs help them swing up to 40 feet in one go, and their strong tail works like an extra arm for grabbing food.
Red-eyed tree frogs have sticky pads on their toes that work like natural climbing gear, letting them scale any surface with ease. Their bright colours might seem silly, but they're perfectly camouflaged against the colourful rainforest backdrop.
Every adaptation here is about mastering movement and staying hidden. In a forest where everything is vertical and competition is fierce, being able to climb, swing, and blend in can mean the difference between dinner and becoming dinner!
Top Tip: Most rainforest animals live in the trees - the forest floor is surprisingly quiet compared to the busy canopy above!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
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.
You can download the app from Google Play Store and Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
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Smart Tools NEW
Transform this note into: ✓ 50+ Practice Questions ✓ Interactive Flashcards ✓ Full Mock Exam ✓ Essay Outlines
Quotes from every main character
English LiteratureApp Store
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
Sociology