KS3 Biology · Years 7 to 9
Photosynthesis & respiration
How plants make their own food and how every living cell releases energy from it: the word equations, the leaf and its stomata, roots, water and minerals, the starch and pondweed experiments, and aerobic and anaerobic respiration.
- 5 topics
- 10 min of notes
- 5 homework sheets
- Test paper
The topics, in order
Each has its revision notes, key words, a common misconception and quick questions; the homework sheets are free to print.
- 1PhotosynthesisThe word equation, chloroplasts, producers2 min read5 questionsHomework sheet
- 2LeavesLeaf structure, adaptations and stomata2 min read5 questionsHomework sheet
- 3Water and mineralsRoots, water and mineral deficiencies2 min read5 questionsHomework sheet
- 4Investigating photosynthesisThe starch test and the pondweed experiment2 min read5 questionsHomework sheet
- 5RespirationAerobic and anaerobic respiration3 min read5 questionsHomework sheet
Test the whole unit
When the topics are revised, one paper covers them all, marked the way an exam would be.
Test paper
KS3 Photosynthesis & respiration Test Paper with Mark Scheme
A 40-mark KS3 biology test paper on photosynthesis and respiration for Years 7 to 9: 22 questions in 40 minutes, with a leaf section to label, the starch test, the pondweed experiment and a rate graph. Plain-English mark scheme included.
- 40 marks, 22 questions
- 40 minutes
- Mark scheme included, 12 pages
Did you know?
- Jan van Helmont grew a willow in a pot for five years. The tree gained about 74 kg; the soil lost about 57 g. The rest came from the air and water.
- In 1771 Joseph Priestley kept a sprig of mint in a jar where a candle had gone out. Later, a candle could burn in there again: the mint had made oxygen.
- Jan Ingenhousz showed in 1779 that plants only freshen the air in sunlight, and only with their green parts.
- Scientists estimate that about half of the oxygen made on Earth each year comes from tiny algae and bacteria in the ocean.
Watch the trailer · 1:06New from Cartana · Beta test 1–31 December
Revision that feels like an adventure
Cartana is our KS3 learning adventure: sail between islands, answer quick-fire questions and battle bosses. It starts with science, with maths on the way, and launches in 2027. This December a small group of testers gets to play it first.
In the Cartana adventure, photosynthesis & respiration is the island Sugarleaf.
- Play the game before its official release
- Help us build it with your feedback
- Earn exclusive in-game items in return