Answer :
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When creating a scale model of the Solar System with a basketball representing the Sun, to accurately represent the size of Earth, Jill should use a tennis ball. Here's why:
1. The size ratio of the Earth to the Sun is approximately 1:109. So, if the basketball represents the Sun, the tennis ball, which is larger than a marble, ping pong ball, or grain of sand, would be the most suitable choice to represent Earth in terms of relative size.
2. Using a tennis ball for Earth would give a better sense of proportion in the scale model compared to smaller objects like marbles, ping pong balls, or grains of sand.
By selecting a tennis ball to represent Earth in her scale model, Jill can provide a more accurate visual representation of the relative sizes of the Sun and Earth in the Solar System.
