Science Ocean Lifeusually ages 12–13

Coral Bleaching & Acidification

Explain the mutualistic symbiosis between coral polyps and photosynthetic zooxanthellae; describe how heat stress causes bleaching (corals expel zooxanthellae and turn white); explain ocean acidification chemistry: CO2 dissolves in seawater to form carbonic acid, lowering pH and dissolving calcium carbonate skeletons; connect reef loss to the collapse of habitat for ~25% of marine species; evaluate current reef restoration efforts

Try this together

Has your child heard of coral bleaching? Can they explain what's actually happening to the coral — what breaks down between the coral and the tiny algae living inside it, and why warmer or more acidic water triggers this?

Where this sits on the map

Stuck here? Check the skills it builds on first. Confident? Here’s what it unlocks.

Builds on

Ocean Ecosystemsages 9–11Coral reef collapse and marine biodiversity depends on ocean ecosystem structure

Ocean Currents and Global Heatages 11–12Coral reef bleaching and ocean acidification depends on understanding thermohaline circulation and ocean heat dynamics

Predator Loss and Ecosystem Effectsages 12–14Coral reef crisis as a case study in ecosystem collapse connects to broader trophic cascade and food web disruption

Coral Bleaching & Acidificationthis skill · ages 12–13

Unlocks

Acids, Alkalis & pHages 12–13KS3 acids/pH and carbonic acid chemistry underpins the ocean acidification mechanism that dissolves coral skeletons

solid = must come firstdashed = helps

Curriculum alignment

Candidate matches to official curriculum codes — machine-suggested, unreviewed (v0.1).

This skill sits beyond Year 6 in the Australian Curriculum, so no F–6 code is matched. It also sits beyond the NSW K–6 syllabuses. It also sits beyond Level 6 in the Victorian Curriculum.

Nearby on the map

Predator Loss and Ecosystem Effectsages 12–14 Deep-Ocean Exploration Technologyages 13–14 Deep-Sea Life Without Sunlightages 11–13 Ocean Currents and Global Heatages 11–12

All Ocean Life skills →