Sheet #50

1. 01

   ReferenceWashing machine85 cm

   To size upBottlenose dolphin2.8 m

   Measured Length of an adult bottlenose dolphin

   It sleeps one brain hemisphere at a time, so it keeps breathing.

2. 02

   ReferenceTwo-storey house8 m

   To size upSunflower2 m

   Measured Height of a cultivated sunflower

   Young sunflowers track the sun; mature ones stay facing east.

3. 03

   ReferenceLight helicopter12.9 m

   To size upSaltwater crocodile4.5 m

   Measured Length of an adult male saltwater crocodile

   It is the largest living reptile.

4. 04

   ReferenceEuropean rabbit42 cm

   To size upQuetzalcoatlus10.5 m

   Measured Estimated wingspan of Quetzalcoatlus northropi

   It is one of the largest flying animals that ever lived.

5. 05

   ReferenceCity bus12 m

   To size upBlue whale24 m

   Measured Length of an adult blue whale

   It is the largest animal known to have ever lived.

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