GCSE Biology - Pyramids of Biomass

*** WHAT'S COVERED ***
1. Pyramids of Biomass.
* What they represent & how they are structured.
2. Biomass Transfer Between Trophic Levels.
* The 10% rule.
3. Reasons for Biomass Loss.
4. Calculating Efficiency of Biomass Transfer.

*** EXAM BOARD INFO ***
AQA - Separate/triple science only
IGCSE Edexcel - Everything is relevant to your course! But you also need to know about pyramids of number and energy, which are very similar.
Edexcel - Separate/triple science only
OCR 21st Century - Separate/triple science only
OCR Gateway - Separate/triple science only

*** CHAPTERS ***
0:00 Intro & Definition of Pyramids of Biomass
0:15 Food Chain Example
0:31 What is Biomass?
0:57 Decreasing Biomass in Pyramids
1:25 Why Biomass Decreases (~10% Rule)
2:03 Reasons for Biomass Loss
3:20 Calculating Efficiency of Biomass Transfer

*** PLAYLISTS ***

#GCSE #Biology #study #revision #school #exam #AQA #OCR #Edexcel #IGCSE #IB #AP

[michaelroberts]

I really can't begin to express my gratitude to you. I feel like I owe you. I had ten days to revise for a biology GCSE equivalency test which is an entry requirement for my university and I spent the whole 10 days binge watching your videos and I passed with 83%. This channel was literally my only resource and you've changed the course of my life. The words thank you seem too small. But thank you.

[Cognitoedu]

- Lessons organised by topic, only the lessons relevant to your specific exam board and tier are shown.
- Automatic progress tracking. Progress bars tell you what you’re doing well at, and what you need to spend some time on.
- Practise quizzes so you can test your knowledge. You can quiz yourself on any combination of topics you like.
- A huge number of fully-hinted questions that take you step-by-step through some of the trickiest calculations & concepts.
- A comprehensive bank of past exam papers, organised both by year, and also by topic.

Amadeus & Tom

[scaramouchiefandango]

Man, these videos are helping me understand Triple biology a lot easier now. Thanks so much, much man! Like, idk where I'd be with my studying for my GCSE's if it weren't for these videos.

[hongseochoi]

I usually never comment on youtube videos, but I have to express my gratitude to you. I have just covered most of the GCSE biology topics within a week. Thank you so much for your free resources.

[rosettegolda]

biology gang! who else is doing this for biology?

[yaboizenos]

I see that a lot of people are thanking you because they need to take a test or something. I'm watching this for school and I need to write a paragraph about this. Thanks for explaining it in a simple way I'm watching this while I'm about to write it.

[Maryam]

I’m honestly thanking God that my teacher told me to watch your videos- I pray I’ll be uploading my great results here in a couple of weeks.

[AS-orzw]

Thanks for these amazing videos. I managed to do all the biology revision in under two weeks. Thanks a lot

[kirrans]

do these videos cover all of the specfication or only most of it? just asking because I'm wondering whether this is all the content necessary for 9-1

[satoyoshitakahashi]

Thank you so much sir. You made my IGCSE amazing!

[chesedprivatelimited]

I hope you continue to add more videos (beyond GCSE coverage and covers all Biology) :) You got the perfect length, pacing and content of your videos that students can absorb. I hope you also add some practice questions as it enhances stickiness of the learnings as well as some sub-playlists (e.g., DNA, Macromolecules, etc) Thankyou very much for wonderful free content!

[l-s]

I finally understood this, thank you so much.

[jimmysinclair]

Is it the 10% of the relative mass that is transferred or is it just 10% of the energy which is transferred?

[Quranforlife]

Bro how have u not got like 10million subscribers you literally have everyhting

[berniceeee_]

Hi, do you illustrate these yourself? Sorry if it sounds unintelligent of me, and also, your videos help me soooo much, thank youuuu!

[karousel]

im having a test tomorrow, wish me luck! and thanks for the videoo

[FetiyaAbdurehim]

I really thought my bio teacher was the best but I was wrong u R the best.I don't even know how to thank you

[faizaiman]

i watched this one day before my exam and I scored an A* thanks a million I watch your every video

[Jai.]

Thank you so much for these free sources! It has greatly helped me revision biology. You explanations are very easy to understand, wonderful presentations, just the right pace! I hope your channel boom sooner and get all the sponsorship you need! Again, thank you.

[lyonneadeniyi-usman]

thanks so much because i only had 3 days to revise for a test but because of you i passed with 93 percent thank alot and i really love your vids