How can you tell they’ve got it: Toxins Building Up in Food Chains?

If they’ve got it, you’ll see things like: Defines bioaccumulation and explains why toxins increase in concentration higher up the food chain; Gives a real example of bioaccumulation (e.g. DDT in peregrine falcons, mercury in tuna); Explains how organisms can change their habitat (e.g. earthworms aerating soil, beavers creating wetlands); Discusses why top predators are most at risk from bioaccumulation. Or just try it together: If your child heard that large fish like tuna can contain more mercury than small fish, could they explain why that is — even though the tuna didn’t encounter mercury directly?

Science Ecosystems & Habitats Ages 12–13

Toxins Building Up in Food Chains

Your child can explain why a big fish like tuna holds more mercury than a small one. Each step up the food chain gathers more, so top hunters carry the most.

In curriculum terms

Explain how organisms affect and are affected by their environment, including the bioaccumulation of toxic materials (e.g. pesticides, heavy metals) through food chains

Ages are typical, not deadlines — follow your child’s pace. How to help at home →

How to tell they’ve got it

Tick these off as you see them — no test required.

Defines bioaccumulation and explains why toxins increase in concentration higher up the food chain
Gives a real example of bioaccumulation (e.g. DDT in peregrine falcons, mercury in tuna)
Explains how organisms can change their habitat (e.g. earthworms aerating soil, beavers creating wetlands)
Discusses why top predators are most at risk from bioaccumulation

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Try this together

If your child heard that large fish like tuna can contain more mercury than small fish, could they explain why that is — even though the tuna didn’t encounter mercury directly?

Where this sits on the map

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

Builds on

Food Webs & Interdependenceages 11–12Bioaccumulation occurs through food chains and webs — the feeding relationships must be understood first

Toxins Building Up in Food Chainsthis skill · ages 12–13

Unlocks

Nothing on the map depends on this yet.

solid = must come firstdashed = helps

Curriculum alignment

Where this fits in the official school curriculum — our best automated guess, not yet checked by a person.

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

Biodiversity & Resilienceages 12–14 Chromosomes, Genes & DNAages 12–13 Evidence for Evolutionages 12–14 Extinction & Rapid Changeages 12–14

All Ecosystems & Habitats skills →