KS3 Ecosystems & food webs Test Paper with Mark Scheme

A 40-mark KS3 biology test paper on ecosystems & food webs for Years 7 to 9: 23 questions to do in 40 minutes, building from quick multiple choice to longer written answers, with the hardest questions in a short stretch section at the end.

What's covered

Food chains: producers and omnivores, a Southern Ocean chain to write with arrows, why chains are short, two pyramids of numbers to choose between and what decomposers do. Food webs: a pond web to read (producers, an animal that is predator and prey) and a knock-on effect to predict, and why cane toads spread in Australia. Toxins and pollinators: DDT concentrations up a lake food chain to describe and compare, why fewer bees means less food, and fertiliser run-off events to put in order. Ecosystems and sampling: a quadrat to count, a results table to turn into a population estimate, random placing and a transect. Competition: what plants compete for and crowded seedlings. Stretch: a hare and lynx graph to explain, sea otters and kelp, and why bread feeds more people than beef.

What's included

• A cover page with space for name, class and date, and a list of what the paper covers
• 23 questions worth 40 marks, graded from easier to harder, with diagrams to label and data to read
• Lined space for every written answer
• A complete mark scheme in plain English: what earns each mark, so you can mark it with confidence even if science was a long time ago

Who it's for

Pupils in Years 7 to 9 checking a whole unit before a test, parents helping at home, and tutors and teachers who want a ready-made end-of-unit assessment. The free revision notes and homework sheets for every topic in the unit are at cartana.org/science.

A print-ready A4 PDF, 14 pages. Download it straight after paying.