The Earth has a radius of about 6400 kilometres,the Sun has a radius of about 7.0×10⁵ kilometres,and a rubber ball has a radius of 6.4 centimetres.If you were to construct a scale model of the solar system using the rubber ball to represent the Earth,what is the radius of a ball needed to represent the Sun in your model?

Question

Quizplus · Accepted Answer

The ratio of the Sun's radius to Earth's radius is 7.0×10⁵ km / 6400 km = 109.375. If the Earth is represented by a 6.4 cm ball, the Sun should be 6.4 cm × 109.375 = 700 cm.

The Earth Has a Radius of About 6400 Kilometres,the Sun