GCSE Biology - Surface Area to Volume Ratio
Вставка
- Опубліковано 21 тра 2022
- This video covers:
- What surface area to volume ratio means
- How to calculate surface area and volume
- Why large organisms need specialised exchange surfaces and transport systems
Maths Playlist:
• GCSE Maths (9-1)
GCSE Chemistry playlist:
• GCSE Chemistry - Atoms...
GCSE Biology Playlist:
• Video
GCSE Physics Playlist:
• Video
Today marks the end of my gcses. I just wanted to come back here and say thank you guys so much for being there for me. You have helped me so much throughout these past two years since I found your channel and I have eagerly watched your videos and used the resources you provided everyone to aid my revision and it has made doing my science exams much easier. I was normally someone who struggled with science for a lot of my secondary life, and finding you guys has changed that. Today I'm proud to say its my last day as a Year 11 student and I have just completed my last gcse exam. From the bottom of my heart, thank you for being there for me and other students too. I couldn't even begin to tell you the massive impact you had on me and other students. I wish everyone here who is doing gcses or even A Levels the best of luck next year! Goodbye. I will return here on results day to let you guys know what I got :)
Congratulations! 🎉 Thank you so much for this message, we really appreciate it and we're glad to have been able to help you on the journey through your G.C.S.E's. Best of luck with your results and A-levels next year! 😊
@@Cognitoedu I'll come back here in August to let you guys know what I get :)
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Thanks to Cognito I got 3 9s in sciences and a 9 in maths. I can't put into words how grateful I am for your videos, you've helped me and countless others
could i ask what else you did for revision other than the videos? like did you make flashcards, write notes, etc
That's good I'm happy for u ☺️👍
How to revise for eng lit and re. Ik this is off topic
Heading into my final year of secondary, and studying for my GCSE’s. You’ve helped me so much and I thank you! You’ve genuinely taught me more (Thanks to your website too) than my teacher has in a whole year. I’ll be back to update this comment when I’m done with my GCSE’s! Thank you again.
Dear Cognito, I know this is a bit late but I only got my GCSEs yesterday. I would like to thank you so much for making these videos, you seriously helped so many people. I managed to get all 9s in triple science thanks to you and I am so grateful. Keep up the amazing work!! Thank you so much once again
Ah that's incredible! 👏 Congratulations, we're glad we could help you with your studies!
I discovered this channel back when I started my IGCSEs, and my words cannot describe how much this channel has helped me. Last year, went from a D- in my first semester to an A in my Biology finals thanks to this channel. Thank you so much :)
Oh my God, thank you so much. I literally never thought revision could be fun before you. This whole SA: Vol thing stumped me ngl.
Usually I find videos to help with gcse hard to keep my concentration on, but this I can actually watch. Thank you for the help
Thank you sir for helping me a lot with studies. Today is a crazy day cause I needed to revise and thanks to you,
I’m going to my exam completely understanding of everything, thank you for your help and God be with you. Much love ❤️
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These videos are so helpful! Just curious when the next one is coming as it's been 4 months now.
Also, you've mentioned that there will be new videos based on trigonometry in GCSE Maths, and are those still going to come, they'd be super helpful for me!
Thanks for these great educating videos, they've helped we improve greatly in understanding the subjects much better!
i actually love you 😂your website carried me through GCSEs and literally saved them
i love this channel, each video I watch is so helpful!
Thank you so much this might be another one of those comments but on the bus to school before my maths gcse which I was already under prepared for I watched some of your maths videos I can say with confidence that you have helped me push my grades way up. Honestly I learnt more on that bus ride that I have learnt in class.
Amadeus, thank you. You got me through my GCSEs.
Sir u hv helped me pass my test with last minute studying, I wish you and your family and family the best of the best. Thank you so much for your dedication, Please continue contributing to the betterment of us student.
so so helpful for iGCSE students as well your platform has been extremely helpful and im so grateful for these videos. it really helps me for my exams! thank you
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Next year I have my gcse exams but I am worried how will I do in other subjects in A levels without your channel's support T-T.
Just a request if u can do make A level videos too. Perhaps on a new channel...
Anyways thank you for the great to the point content you provide.
May your channel grow even more!
Hey man, I’m just commenting to say that my IGCSEs results came out and I got an A* in coordinated science (all 3 combined) Thank you for all the videos!
your videos helped so much while studying for my igcses, im so happy with the grades i got and its thanks to this channel! im moving on to A level now and i was wondering, are you ever planning on making videos for A level?
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Your guys videos has helped me immensely for my gcse's , could you guys make videos like these for common A levels like maths and the sciences,thankyou for all the help you guys have given.
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This was on our 2022 biology paper 1 higher
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Just finished watching the whole biology play list in less than 12 hours, as revision for my exam tomorrow. Hope it proofs useful.
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Heyy!!
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Summary:
Larger organisms require speciallised organs like transport systems and exchange surfaces (like villi and alveoli) as they have lower surface area to volume ratio (surface area deceases as the size of organisms increases) and therefore they can’t rely only on diffusion.
Smaller organisms (mostly unicellular) don’t have and don’t need speciallised organs as they have larger surface area to volume ratio and so they can totally rely on diffusion for the transport of molecules.
Note: surface area to volume ratio decreases as the organism gets larger and so when the surface area to volume ratio decreases the reliance of diffusion of the organism too decreases and they are more likely to develop a specialized organ.
hey! just to let you know, your website is really really helpful. I've been using it ever since it launched and I can see the improvement in my confidence in all three sciences. Appreciate your efforts 💯💯
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Your site is relly good ,could you please make sure that all videos are linked to their topic please
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Really helped thank u so much i had an exam and u helped me sm
thank you so much for creating these videos and also the website which are so helpful and helped me during my gcse revision
thanks to you i got a 9-8 in combined science and im so happy
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You're very welcome and congratulations, those are great results 👏
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I want to ask why is the CHEMISTRY exam Qs by Topic are not working ?
These videos are really helpful, thank you :) Could you please do one one the nitrogen cycle ? Those of us doing OCR Gateway would really, really appreciate it.
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That's awesome Hanan! Congratulations! 👏
I was about to drop biology off, but then I found this website. After learning here for about 1 week, I've become top of my class and get really interested in biology and want to pursue career in healthcare fields. I just want to thank you so much for this because it's helped me to much.
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@@Cognitoedu Hi Cognito. Hope you guys are well. Will you guys keep releasing videos in the future?
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0:23 large multicellular what
He said organisms
I guess I need to clean my ears with shovel.
@@blackholedividedbyzero Nah it sounds like orgasms
how is my mind gonna do me dirty even when im revising ._.
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I think you guys should also make videos on GCSE English, that way it will be so much easier to study for our exams
Congrats on 300k with 400 vids
Lol
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What tools did you use to make such amazing videos.
Can you please suggest why I’m not getting the CIE 2023 -2024 course selection option in the website?
Hey Cognito please can you do GCSE computer science as another subject you teach please, that would be lovely???🙏
Hi,
I have a major request
Please can you make a video on the Higher Tier AQA content list coming up in 2022 GCSE Alot of people are revising wrong things please can you help. I will will be truly grateful
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Does anyone know of similar teaching platforms for Computing Science GCSE?
I just wanted to say THANK YOU SMMM for all the help during my gcses!!! I got all 9's for bio chem and physics and ur videos helped me sm :)
Ah congratulations Tara, that's great! Glad we could help 😊
Hello, I would like to ask for a GCSE math video about linear programming.I tried searching other videos, but it is no help. Can you please make one?
Could we possibly get a level physics videos for when I go to sixth form?
please make a video on calculation area of composed objects
Are all of these videos including maths and all the sciences compatible for IGCSE like Edexcel?
wouu it's very helpful thanks!!!!!!!
Hi there,
I am a science teacher and I think you channel is great. I always recommend it to my students.
I really love the layout of your presentations. I am wondering, would you mind telling me what app you use to make your presentations?
Best wishes,
Ciara
Thanks for the kind comment! This one was made using sketchbook on the iPad, and iMovie - in a bit of an unintuitive process. These days we use Adobe after effects :)
What are your plans for the next subject
I used the best website there is for science and it was your's cognito, So can u please add A-level biology videos made by u. I'm sure it would help u more than it will help me.
Can you add your new updated osmosis video to your biology playlist. It’s annoying me. 😉
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Absolutely brilliant videos and website btw my daughter puts you up there alongside Zeus ! 😀
I have a request to make... Can you make a video on Biotechnology plss!!! Anyways, Thanks for helping with Biology as always...
Thanks to you I got a 8-7 in my double science ☝️
Great stuff - congratulations and well done for all your hard work!
Thanks for teaching me something my teacher can't
Did anyone notice that this is the 400th video of this channel?
why did you keep saying 'specialized exchange surfaces' when it showed specialized exchange systems?
Please explain thermal decomposition
hope you dont mind me pointing out, there's a slight mistake in the topic names for edexcel higher physics: topic 6 is named radioactivity which is correct, but then topic 7 is also named radioactivity when it should be astronomy. as ive already said, the website is incredible thank you so much🌟🌟
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Please,how do you make your videos
Heyy I really love your website... I would really appreciate it if you could post topic questions for Edexcel As level, chemistry, biology, physics; 21 of my friends are willing and would be glad to engage in your website too!!
Thanks
Thanks Naksharithra, we'll look into it 👍
Cognito should do a course on psychology
bit of a late thankyou, but your website with the videos and questions saved me during gcses and now im studying biology for an a level. You taught me more then anything ive ever learnt at school. tysm