In a ten- billion to one scale model, the Sun and the Earth are about the size of
A)a grape and a grain of sand.
B)a grapefruit and a grape.
C)a grapefruit and a grain of sand.
D)a basketball and a grape.

Question

Quizplus · Accepted Answer

A ten-billion to one scale model means that everything is shrunk down by a factor of ten billion. Therefore, the Sun and the Earth would be much smaller than in real life. (A) and (D) are too large for the sizes of the Sun and Earth to be scaled down by that much. (B) is a closer comparison, but a grapefruit is still too large. (C) is the best choice because a grapefruit is a reasonable size for a scaled-down Sun and a grain of sand is a reasonable size for a scaled-down Earth.

In a Ten- Billion to One Scale Model, the Sun