Compare Object Sizes Practice Test

A model uses diameter ratios (not mass and not distance). It states: Earth’s diameter is about 4 times the Moon’s diameter. If Earth were represented by a circle 8 cm across, about how wide should the Moon’s circle be to keep the model consistent?

Note: Drawings in books may exaggerate sizes unless a scale is stated.

A student accidentally copied a table of radii but labeled the column “diameter.” The column below is actually radius (half the diameter). Note: radius and diameter are different.

Based on the radius data, which object has the largest diameter?