Habitats & Basic Needs

Activities to try

1. 1

   Build-a-habitat: match every need to a feature

   Why it works: 'Suited to' means every basic need is met by something in the habitat; an organism placed where a need cannot be met cannot survive. Suitability is a causal consequence, not decoration or appearance. Plants as well as animals have needs met by their habitat.

   1. Place an organism (e.g. a frog) into different habitats — pond, desert, woodland — and for each one go through a four-item needs checklist: food, water, shelter, suitable conditions.
   2. For each need, name the specific habitat feature that supplies it, or mark it unmet: e.g. 'the pond gives the frog water, insects to eat, and reeds to hide in.'
   3. Also work a plant case: place pond weed and ask whether it could move to the desert — name which needs (water, suitable conditions) the desert fails, so plants are seen to have needs and a habitat just as animals do.
   4. Predict out loud what happens when a need is unmet — e.g. a pond frog in a dry desert has no pond water and no damp place to keep its skin moist, so it cannot survive there.
   5. Finally, design a suitable home for a new creature and defend it need-by-need, stating which feature meets each need.
2. 2

   Depend on each other: the mutual pair

   Why it works: Living things depend on each other, not only on the physical place; removing one organism can take away another organism's met need. Interdependence between organisms is a concrete relationship before it is an abstract 'web.'

   1. Study a mutual-dependence pair of living things — bee and flower — and state what each gives the other (bees pollinate flowers so they make seeds/fruit; flowers feed bees).
   2. Trace one dependency chain in a pond — pond plants feed insects, insects feed the frog — and say which organism relies on which.
   3. Explore 'remove the bees' as a thought-experiment: flowers that rely on bees to carry their pollen would make fewer seeds and fruit, so an animal that fed on those seeds or fruit could lose some of its food. Say which need flips to unmet and why. (Some plants, like grasses, are pollinated by the wind instead, and other animals besides bees can also pollinate.)
   4. Name one thing the frog gives back to the pond, not just what it takes, to see dependence running both ways.
   5. (Extension) Note that a worm also depends on its soil habitat — the soil gives it food and shelter and the worm enriches the soil — but recognise soil is part of the habitat, not another living partner like the bee and flower.
3. 3

   Talk it through as the organism

   Why it works: Being able to say, in your own words, which need each feature meets and which need a wrong place fails shows the matching is understood, not memorised, and transfers to new organisms.

   1. Take the role of an organism: 'I'm a frog — what do I need, and where in my habitat do I get each thing?'
   2. Have a partner (or the learner) propose a different home for the creature, then say which specific need would fail there and why.
   3. Transfer to a new case: a woodlouse lives under a damp log — say what would happen to it on a hot, dry path and which need (damp shelter/suitable conditions) fails.
   4. Say aloud a full explanation: name each need, the feature that meets it, and at least one way the organism depends on another organism.