Ecology and Environment
MYP Year 1 Sciences — Ecology and Environment
Ecology questions look easy because the vocabulary sounds like everyday English — but every mark in this topic hinges on precision. Is that thing living or non-living? Is the arrow in a food chain pointing the right way? Is the herbivore count actually proportional to the producer count, or just bigger? Examiners set up pond diagrams, forest lists and quadrat tables specifically to catch the fuzzy thinkers. This topic is about learning the exact categories — biotic/abiotic, producer/consumer/decomposer, structural/behavioural adaptation — and applying them to messy real data, not just memorising definitions.
Overview — How This Topic Fits Together
What ecology actually studies
Ecology is the study of how living things interact with each other and with their non-living surroundings. Every ecosystem — a pond, a forest, a grassland — is really just a set of relationships: who eats whom, who needs what, and how energy and matter move through the system. Six ideas run through everything you'll be tested on: what an ecosystem is made of, how energy flows and shrinks as it moves up trophic levels, how humans disturb these systems, why variety of life matters, how organisms are built or behave to survive their specific habitat, and how all of this is mapped using food chains and webs.
- Almost every exam question starts by giving you a real or imagined ecosystem (a pond, a forest list, a grassland quadrat table) and asking you to sort or interpret it — so classification skill matters more than raw recall.
- Data-based questions (quadrat counts, temperature readings, worm-investigation results) are common — you need to read tables and describe relationships, not just define terms.
- The same core vocabulary — biotic, abiotic, producer, consumer, decomposer, trophic level — reappears in every subtopic, so nailing definitions once pays off across the whole unit.
The shape of the chapter
Command terms that show up in ecology questions
| Command term | What it demands | AO | Mark-earning move |
|---|---|---|---|
| Identify | Name a thing from given data or a list — no explanation needed. | AO1 | One correct word/phrase = full mark. Extra explanation earns nothing and wastes time. |
| Name | Give the correct term or example. | AO1 | Must use the specific ecological term (e.g. 'producer', not 'plant thing'). |
| Describe | State what is happening, including a trend or feature, in full sentences. | AO2 | Needs a linking word (e.g. 'as...increases...') to score the relationship mark, not just two isolated facts. |
| Explain | Give a reason — cause and effect — not just a description. | AO2/AO3 | Marks lost when students describe what happens but never say why. |
| Distinguish/Compare | State a difference (or similarity) between two named things. | AO3 | Must reference BOTH items in the same sentence, not describe them separately. |
| Suggest | Apply reasoning to a new or unfamiliar scenario. | AO3 | No single 'correct' answer — mark scheme accepts any scientifically sound reasoning. |
Key point
Overview