Year 8 · Summer First Half
Biology
3 lessons from 2 units.
Unit B7 · lesson 4 of 4
A tree weighing tonnes was built almost entirely out of a gas you cannot see, and a small amount of water. This unit is about the reaction that does it, the leaf built to run it, and why almost everything alive depends on something else having run it first.
Unit B8 · lessons 1 to 2 of 5
Every cell you own is running the same reaction right now, and has not stopped since you were an embryo. This unit is about what that reaction takes in, what it gives out, what happens when the oxygen runs short, and why a brewery and a yoghurt factory are both built around it.
- 04Why almost all life depends on itSystemOne reaction, running in leaves and in water you cannot see into, is the doorway through which almost all the energy in the living world arrives — and the source of every breath you have ever taken.Open this lesson
- 01Aerobic respirationProcessThe reaction that keeps you alive is the photosynthesis equation run backwards, at body temperature, without a flame — and its main product leaves through your mouth without you noticing.Open this lesson
- 02Why every cell respiresSystemWeeks without food. Days without water. Minutes without oxygen. The gap between those three numbers is the whole subject of this lesson.Open this lesson
Back to all three sciences this half term The whole KS3 Biology course