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Not all minibeasts are insects

Not all minibeasts are insects: distinguishing insects from other minibeasts. Spiders have 8 legs and 2 body parts (arachnids), woodlice have 14 legs (crustaceans), worms have no legs, snails have a shell and one foot. The 'Is it an insect?' sorting game.

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What a learner can do afterwards

  • Sort a set of minibeasts into 'insect' and 'not insect' groups using the six-legs rule
  • Explain why a spider is not an insect by noting it has eight legs and two body parts
  • Name at least one difference between insects and another minibeast group such as worms having no legs or woodlice having fourteen

The lesson

You already know the rule: an insect has six legs and three body parts. But not every small creature you find outside is an insect. Some minibeasts just live in the same places, like under rocks or in the grass, without being insects at all.

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An insect has 6 legs. A spider has 8 legs and only 2 body parts. Eight is more than six, so a spider is not an insect. It is an arachnid.
Try it together

A woodlouse has fourteen legs, way more than an insect's six. A worm has no legs at all and moves by stretching its long body. Both are minibeasts, but neither one is an insect.

Tap each dot and count out loud.

A snail is a minibeast too. It carries a shell on its back and glides along on one foot. Like the worm, a snail has no legs, so it is not an insect either.

Good to know

When you play the 'Is it an insect?' game, count the legs first. Six legs and three body parts means yes. Any other number, like eight, fourteen, or zero, means no, it is a different kind of minibeast.

Insects have six legs and three body parts. Spiders, woodlice, worms, and snails are minibeasts, but none of them are insects.

Watch it

Where it sits

Where this leads

Jobs that lean on this skill. Follow one to see everything it is built on.

Then practise

8 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.

Not all minibeasts are insects · Science, ages 7 to 9 · LightMySky