Category Archives: B8 Reproduction, B9 Energy Flow, B10 Human influences

B8 Reproduction (Combined Science)

B8.2 SEXUAL REPRODUCTION IN PLANTS

Plant reproduction from chduncan

Flower dissection by Mr Exham (Mr Exham.com):

Flower to fruit in eight weeks:

A 3m 27s vid on Germination from Bitesize Top 20 Demos and here is a time-lapse video showing germination of a climbing bean:

And here is mung bean germination:

The beautiful tricks of flowers  – a 14m TED-Ed talk from Jonathan Drori, and here’s The Beauty of Pollination:

B8.3 SEXUAL REPRODUCTION IN HUMANS

Igcse biology edexcel 3.8 3.12 from Marcos Rodriguez

Right here, right now by Fatboy Slim and an animation that takes us from conception to just before birth.

Medical animations that include fertilisation, ovulation, labor and birth and here is ovulation captured on film for the first time.

THE MENSTRUAL CYCLE

Why do women have periods? – a 4m 45s TED-Ed video.

FERTILISATION

The Great Sperm Race Game.

The physics of sperm versus the physics of sperm whales – a fascinating animated vid from TED-Ed (4m 18s).

PREGNANCY & BIRTH

Here are some pregnancy illustrations and birth animations – aimed at expectant mothers.

BREAST-FEEDING

Learn the differences between breast milk and baby formulas with tips from a registered nurse in this free video on family health.

HIV / AIDS

Fantastic animated tutorials from McGraw Hill Education on HIV replication & how the HIV infection cycle works. This is much more detailed than you need.

Hans Rosling unveils new data visuals that untangle the risk factors of HIV. He argues that preventing transmissions – not drug treatments – is the key to ending the epidemic.

B9 Energy Flow in Ecosystems (Combined Science)

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. 

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):

B10 Human Influences on the Ecosystem (Combined Science)

For self-assessment questions, with exercises and discussions, just click on the correct topic at Biology GCSE & IGCSE Question Bank. 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. 

Here are key terms and some definitions: Key Terms B11

Eutrophication – a short video from The Virtual School:

Mr W sings Seven ways to reduce carbon.

Science in Focus – The Human Impact – a 19m video and here’s a short (less than 5 minute) video clip from BBC iScience – Acid Rain.

What really happens to the plastic you throw away:

The Great Pacific Ocean Garbage Patch: