Category: Science

Sir Isaac Netwotn’s three laws of motion. Three states of matter (solid, liquid, gas). We live on the third rock from the sun. Our metric system of measurement uses metre, litre, and gram. Morse code is a reliable system as the signal is made up of only three parts – a long ‘on’, the dash; a short ‘on’, the dot; and an ‘off’ signal. Do you know what SOS means in Morse code?

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Merlin Chair

Merlin Chair (A).

A three-wheeled invalid chair, with a double tyre to the two front wheels, the outer tyre being somewhat smaller than that on which the chair rests, so that by turning it with the hand the chair can be propelled. Named after the inventor.

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Planarian

The common name for several genera of the free-living (turbellarian) flatworms belonging to the order Tricladida, a name that derives from their characteristic three-branched digestive cavities.

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Schistosomiasis

Bilharziasis, or snail fever, parasitic disease caused by blood flukes, trematode worms of the genus Schistosoma. Three species are human parasites: S. mansoni, S. japonicum, and S. haematobium.

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