Rastliny sú živé organizmy, ktoré potrebujú vykonávať dôležité procesy na... Show more
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Ako prebiehajú životné procesy u rastlín
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Základy a kľúčové pojmy
Predstav si rastliny ako malé fabriky, ktoré pracujú 24 hodín denne. Fotosyntéza je ich spôsob, ako si vyrobiť jedlo pomocou slnka, vody a oxidu uhličitého – pričom nám darujú kyslík. Dýchanie rastlín funguje ako náš metabolizmus – rozkladajú svoju potravu, aby získali energiu.
Rastliny majú špeciálne časti na všetko. Chlorofyl je zelené farbivo, ktoré zachytáva slnečnú energiu ako solárny panel. Prieduchy sú malé otvory na listoch – fungujú ako ich "nos" a "ústa" naraz.
Koreňové vlásky sú ako tisíce malých slamiek, ktoré nasávajú vodu a živiny z pôdy. Cievne zväzky potom fungují ako dopravný systém – xylém vedie vodu nahor, floém rozvážá cukor po celej rastline.
💡 Tip na zapamätanie: Rastlina je ako malé mesto s vlastným dopravným systémom, fabrikou na jedlo a klimatizáciou!
Fotosyntéza - výroba jedla zo slnka
Toto je najúžasnejší trik v prírode – rastliny si vyrábajú jedlo zo svetla! Potrebujú na to len slnečné svetlo, vodu a oxid uhličitý. Je to ako keď varím, len namiesto sporáka používajú slnko.
Celý proces sa odohráva v listoch, konkrétne v malých zelených častiach zvaných chloroplasty. Chlorofyl v nich zachytí slnečnú energiu a premení vodu plus CO₂ na cukor a kyslík. Cukor je jedlo pre rastlinu, kyslík je bonus pre nás.
Fotosyntéza funguje len cez deň, keď je svetlo. Preto izbové rastliny dávame k oknu a preto v lese nie sú rastliny tam, kde je tma. Bez svetla = bez jedla = problém!
Rovnica: Voda + CO₂ + slnečné svetlo → cukor + kyslík
💡 Zaujímavosť: Jeden veľký strom dokáže vyprodukovať kyslík pre dvoch ľudí celý deň!
Dýchanie rastlín - získavanie energie
Aj rastliny musia "jesť" svoju potravu, aby získali energiu na rast. Dýchanie rastlín je presne opak fotosyntézy – berú cukor, ktorý si vyrobili, pridajú kyslík a "spália" to na energiu.
Toto sa deje 24 hodín denne, aj v noci. Rastliny potrebujú energiu stále – na rast, na tvorbu kvetov, na transport vody, na všetko. Pri tomto procese vzniká oxid uhličitý a voda, ktoré rastlina uvoľňuje.
Je to presne ako u nás ľudí – jedlo plus kyslík = energia plus CO₂. Len my jedlo nekombinujeme zo slnka, ale musíme si ho kúpiť v obchode!
Rovnica: Cukor + kyslík → energia + CO₂ + voda
💡 Dôležité: Cez deň rastliny produkujú viac kyslíka (fotosyntézou), ako spotrebujú (dýchaním). V noci len dýchajú, takže spotrebúvajú kyslík.
Prijímanie vody a transpirácia
Korene sú ako obrovská sieť slamiek pod zemou. Koreňové vlásky zväčšujú ich povrch, takže rastlina dokáže nabrať oveľa viac vody a minerálnych látok (to jsou vitamíny pre rastliny).
Voda potom cestuje cez xylém – špeciálne rúrky vo vnútri rastliny – až do listov. Je to ako vodovod, len namiesto pumpy funguje transpirácia – odparovanie vody z listov.
Transpirácia funguje ako náš pot. Keď sa voda odparuje z listov cez prieduchy, vytvorí to ťah, ktorý nasaje novú vodu z koreňov nahor. Plus to ochladí rastlinu v horúcich dňoch.
Preto musíš rastliny polievať – bez vody nie je fotosyntéza, transport živín ani pevnosť rastliny. Ale pozor na preliatie – korene potrebujú aj kyslík na dýchanie!
💡 Praktický tip: Ak listy rastliny vädnú, obvykle to znamená, že má málo vody alebo že korene sú zaliate a "dusia sa".
Praktické príklady a aplikácie
Keď rastlina nemá dostatok svetla, prestane robiť fotosyntézu a postupne chradne. Preto izbové rastliny dávame k oknu a preto v hustom lese môžu rásť len tieňomilné rastliny.
V horúcom dni rastliny zvyšujú transpiráciu – odparujú viac vody na ochladzovanie. Preto v lete potrebujú viac zalievania. Je to ich prirodzená klimatizácia.
Rastliny v miestnosti cez deň čistia vzduch – spotrebúvajú CO₂ a produkujú kyslík. V noci síce dýchajú kyslík, ale množstvo je také malé, že sa nemusíš báť mať ich v spálni.
Hnojenie rastlín dodáva minerálne látky – hlavne dusík (pre rast), fosfor (pre korene) a draslík (pre kvety a plody). Je to ako vitamíny pre ľudí.
💡 Test tip: Pamätaj si, že fotosyntéza = výroba jedla + kyslíka (len za svetla), dýchanie = spotrebúvanie jedla + kyslíka na energiu (stále).
Rýchle zhrnutie na test
Fotosyntéza: Voda + CO₂ + svetlo → cukor + kyslík (len cez deň, v listoch)
Dýchanie: Cukor + kyslík → energia + CO₂ + voda (stále, všade v rastline)
Transport: Xylém nesie vodu nahor, floém rozvážá cukor po rastline
Kľúčové časti: Chlorofyl (zachytáva svetlo), prieduchy (výmena plynov), koreňové vlásky (nasávajú vodu)
Transpirácia: Odparovanie vody z listov, vytvára ťah na nasávanie novej vody
Rastliny sú jediné organizmy, ktoré si vedia vyrobiť jedlo zo slnka. Bez nich by nebolo života na Zemi – dávajú nám kyslík, potravu a čistia vzduch. Preto sú lesy také dôležité!
💡 Na záver: Každý proces má svoj účel – fotosyntéza vyrába jedlo, dýchanie dodáva energiu, transport zabezpečuje distribúciu a transpirácia funguje ako chladenie.
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
Where can I download the Knowunity app?
You can download the app in the Google Play Store and in the 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.
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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.
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Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
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
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
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 app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
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
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
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
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
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 app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
Ako prebiehajú životné procesy u rastlín
Rastliny sú živé organizmy, ktoré potrebujú vykonávať dôležité procesy na prežitie, rovnako ako ty a ja. Tieto životné procesy zahŕňajú výrobu potravy, dýchanie a prijímanie vody – a sú to presne tie veci, ktoré robia rastliny základom života na našej... Show more
Základy a kľúčové pojmy
Predstav si rastliny ako malé fabriky, ktoré pracujú 24 hodín denne. Fotosyntéza je ich spôsob, ako si vyrobiť jedlo pomocou slnka, vody a oxidu uhličitého – pričom nám darujú kyslík. Dýchanie rastlín funguje ako náš metabolizmus – rozkladajú svoju potravu, aby získali energiu.
Rastliny majú špeciálne časti na všetko. Chlorofyl je zelené farbivo, ktoré zachytáva slnečnú energiu ako solárny panel. Prieduchy sú malé otvory na listoch – fungujú ako ich "nos" a "ústa" naraz.
Koreňové vlásky sú ako tisíce malých slamiek, ktoré nasávajú vodu a živiny z pôdy. Cievne zväzky potom fungují ako dopravný systém – xylém vedie vodu nahor, floém rozvážá cukor po celej rastline.
💡 Tip na zapamätanie: Rastlina je ako malé mesto s vlastným dopravným systémom, fabrikou na jedlo a klimatizáciou!
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Fotosyntéza - výroba jedla zo slnka
Toto je najúžasnejší trik v prírode – rastliny si vyrábajú jedlo zo svetla! Potrebujú na to len slnečné svetlo, vodu a oxid uhličitý. Je to ako keď varím, len namiesto sporáka používajú slnko.
Celý proces sa odohráva v listoch, konkrétne v malých zelených častiach zvaných chloroplasty. Chlorofyl v nich zachytí slnečnú energiu a premení vodu plus CO₂ na cukor a kyslík. Cukor je jedlo pre rastlinu, kyslík je bonus pre nás.
Fotosyntéza funguje len cez deň, keď je svetlo. Preto izbové rastliny dávame k oknu a preto v lese nie sú rastliny tam, kde je tma. Bez svetla = bez jedla = problém!
Rovnica: Voda + CO₂ + slnečné svetlo → cukor + kyslík
💡 Zaujímavosť: Jeden veľký strom dokáže vyprodukovať kyslík pre dvoch ľudí celý deň!
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Dýchanie rastlín - získavanie energie
Aj rastliny musia "jesť" svoju potravu, aby získali energiu na rast. Dýchanie rastlín je presne opak fotosyntézy – berú cukor, ktorý si vyrobili, pridajú kyslík a "spália" to na energiu.
Toto sa deje 24 hodín denne, aj v noci. Rastliny potrebujú energiu stále – na rast, na tvorbu kvetov, na transport vody, na všetko. Pri tomto procese vzniká oxid uhličitý a voda, ktoré rastlina uvoľňuje.
Je to presne ako u nás ľudí – jedlo plus kyslík = energia plus CO₂. Len my jedlo nekombinujeme zo slnka, ale musíme si ho kúpiť v obchode!
Rovnica: Cukor + kyslík → energia + CO₂ + voda
💡 Dôležité: Cez deň rastliny produkujú viac kyslíka (fotosyntézou), ako spotrebujú (dýchaním). V noci len dýchajú, takže spotrebúvajú kyslík.
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Prijímanie vody a transpirácia
Korene sú ako obrovská sieť slamiek pod zemou. Koreňové vlásky zväčšujú ich povrch, takže rastlina dokáže nabrať oveľa viac vody a minerálnych látok (to jsou vitamíny pre rastliny).
Voda potom cestuje cez xylém – špeciálne rúrky vo vnútri rastliny – až do listov. Je to ako vodovod, len namiesto pumpy funguje transpirácia – odparovanie vody z listov.
Transpirácia funguje ako náš pot. Keď sa voda odparuje z listov cez prieduchy, vytvorí to ťah, ktorý nasaje novú vodu z koreňov nahor. Plus to ochladí rastlinu v horúcich dňoch.
Preto musíš rastliny polievať – bez vody nie je fotosyntéza, transport živín ani pevnosť rastliny. Ale pozor na preliatie – korene potrebujú aj kyslík na dýchanie!
💡 Praktický tip: Ak listy rastliny vädnú, obvykle to znamená, že má málo vody alebo že korene sú zaliate a "dusia sa".
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Praktické príklady a aplikácie
Keď rastlina nemá dostatok svetla, prestane robiť fotosyntézu a postupne chradne. Preto izbové rastliny dávame k oknu a preto v hustom lese môžu rásť len tieňomilné rastliny.
V horúcom dni rastliny zvyšujú transpiráciu – odparujú viac vody na ochladzovanie. Preto v lete potrebujú viac zalievania. Je to ich prirodzená klimatizácia.
Rastliny v miestnosti cez deň čistia vzduch – spotrebúvajú CO₂ a produkujú kyslík. V noci síce dýchajú kyslík, ale množstvo je také malé, že sa nemusíš báť mať ich v spálni.
Hnojenie rastlín dodáva minerálne látky – hlavne dusík (pre rast), fosfor (pre korene) a draslík (pre kvety a plody). Je to ako vitamíny pre ľudí.
💡 Test tip: Pamätaj si, že fotosyntéza = výroba jedla + kyslíka (len za svetla), dýchanie = spotrebúvanie jedla + kyslíka na energiu (stále).
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Rýchle zhrnutie na test
Fotosyntéza: Voda + CO₂ + svetlo → cukor + kyslík (len cez deň, v listoch)
Dýchanie: Cukor + kyslík → energia + CO₂ + voda (stále, všade v rastline)
Transport: Xylém nesie vodu nahor, floém rozvážá cukor po rastline
Kľúčové časti: Chlorofyl (zachytáva svetlo), prieduchy (výmena plynov), koreňové vlásky (nasávajú vodu)
Transpirácia: Odparovanie vody z listov, vytvára ťah na nasávanie novej vody
Rastliny sú jediné organizmy, ktoré si vedia vyrobiť jedlo zo slnka. Bez nich by nebolo života na Zemi – dávajú nám kyslík, potravu a čistia vzduch. Preto sú lesy také dôležité!
💡 Na záver: Každý proces má svoj účel – fotosyntéza vyrába jedlo, dýchanie dodáva energiu, transport zabezpečuje distribúciu a transpirácia funguje ako chladenie.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
Where can I download the Knowunity app?
You can download the app in the Google Play Store and in the 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.
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4.7/5
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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
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
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
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
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 app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
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
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
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
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
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 app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user