DO YOU KNOW?
1. Why do we swing our arms when ; we walk? j 2. Why can a steel ship float? 3. Why are fish slippery? 4. Why do our ears have lobes ? ! i I Answers. 1. The pendulum-like swing of our arms when walking serves the double purpose of maintaining balance, and iat the same time, opening the lungs ; to help breathing. 2. Beeause the weight of steel and j the weight of the air inside the ship j is less than the weight of the water which it displaces. Solid steel will ! sink, beeause it is heavier than water, i but a steel ship is really ia steel box j full of air. ' I 3. Most fish' have an outer skin en- | veloping the true skin. The outside ! skin cofttains thousands of glands, i which secrete a filmy-slime, making ; it easier for the fish to pass through j water. 4. The weight of the lobe keeps the j drum of the ear stretched in a way J that best enables it to trap sound ■ waves.
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https://paperspast.natlib.govt.nz/newspapers/RMPOST19330913.2.62.3
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Rotorua Morning Post, Volume 3, Issue 635, 13 September 1933, Page 7
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177DO YOU KNOW? Rotorua Morning Post, Volume 3, Issue 635, 13 September 1933, Page 7
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