Sheet #25

1. 01

   ReferenceUSB flash drive6 cm

   To size upLight bulb11 cm

   Measured Height of an A60-shaped light bulb

   The "60" in A60 is its diameter: 60 mm.

2. 02

   ReferenceWatermelon30 cm

   To size upSmartphone14.7 cm

   Measured Height of a smartphone with a 6.1-inch screen

   Screen size is measured diagonally: 6.1 inches is about 15.5 cm.

3. 03

   ReferenceBasketball hoop3.05 m

   To size upBowling ball21.9 cm

   Measured Diameter of a regulation bowling ball

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

4. 04

   ReferencePencil19 cm

   To size upWoolly mammoth3 m

   Measured Shoulder height of a male woolly mammoth

   It was no bigger than a modern African elephant.

5. 05

   ReferenceBlue whale24 m

   To size upOstrich2.4 m

   Measured Height of an adult male common ostrich

   It is the largest living bird: it cannot fly but runs at over 60 km/h.

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