Sheet #34

1. 01

   ReferenceComputer keyboard44 cm

   To size upBowling ball21.9 cm

   Measured Diameter of a regulation bowling ball

   All balls share the same diameter: only the weight changes.

2. 02

   ReferenceBottlenose dolphin2.8 m

   To size upLion1.1 m

   Measured Shoulder height of an adult male lion

   A lion's roar can be heard up to 8 km away.

3. 03

   ReferenceTwo-storey house8 m

   To size upArc de Triomphe50 m

   Measured Height of the Arc de Triomphe, Paris

   In 1919 a pilot flew a plane through the arch to celebrate the end of the war.

4. 04

   ReferenceGolf ball4.27 cm

   To size upHippopotamus1.5 m

   Measured Shoulder height of an adult hippopotamus

   Despite its short legs, it runs at 30 km/h on land.

5. 05

   ReferenceSmall car4.05 m

   To size upWind turbine150 m

   Measured Tip height of a recent onshore wind turbine

   A single onshore blade can be over 50 m long.

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