For self-assessment questions, with exercises and discussions, just click on the correct topic at Biology GCSE & IGCSE Question Bank. A powerpoint can be downloaded from the same site here. The s-cool revision site lets you revise the topic, summarizes the topic & tests you on it. Skoool gives you a lesson, including progress questions, for each Biology topic but you’ll need sound on for it. And both these sites –  GCSE Bitesize & GCSE Bitesize – have revision pages (that take you through the topic), a test and an activity. 

B10 Revision notes in downloadable word format and here are some key terms and definitions: Key Terms B10

GCSE Bitesize covers Living Things in their Environment in 16m 44s.

ECOLOGY (food chains, food webs & trophic levels):

What is an ecosystem? video from The Virtual School:

What is a trophic level? video from The Virtual School:

Mr W sings Food Chains.

ENERGY TRANSFER:

Science Bank 10 (Energy Cycles in Nature): Part 1 – Energy transfer in nature – food chains & energy flow through them (to 5m 25s); Part 2 – the Carbon cycle (to 10m 55s):

NUTRIENT CYCLES:

A short (2m 26s) vid from Clipbank – Recycling Nutrients & Dr Yan’s Rotting Food time lapse from Bang Goes the Theory (1m14s). What happens to your body after you die? – Instant Egghead video (2m 10s).

The Carbon Cycle: Carbon Cycle Video – Lesson Starter (3m), Carbon Cycle cartoon by Sofia (Climate Champion, 2006) & GCSE Bitesize – The Carbon Cycle (2m 41s). Finally, Mr W sings ‘7 ways to reduce carbon’:

How wolves change rivers (a nice intro to Ecology):

TEXTBOOK REVISION

IGCSE Biology: Coursebook, chapter 15, pp. 218- 224