An analogy makes a comparison between objects based on their similar qualities. Cassidy wanted to create an analogy for the motion of atoms in solids, liquids, and gases, so she compared them to marbles in a tray.
Answer
A
A solid is like the tray being shaken and the marbles moving around it, and a liquid is like the tray being shaken slowly and all the marbles moving in their positions.
B
A solid is like the tray being shaken slowly and all the marbles moving in their positions, a liquid is like the tray being shaken and the marbles moving around it, and a gas is like the tray being shaken hard and the marbles moving vigorously around it.
C
A gas is like the tray being shaken slowly and all the marbles moving in their positions, and a solid is like the tray being shaken hard and the marbles moving vigorously around it.
D
A liquid is like the tray being shaken hard and the marbles moving vigorously around it, and a gas is like the tray being shaken slowly and all the marbles moving in their positions.
Explanation
In a solid, atoms vibrate in place, like marbles moving only slightly when the tray is shaken slowly. In a liquid, particles can move past one another, like marbles moving around when the tray is shaken. Gas particles move freely and rapidly, matching marbles moving vigorously when the tray is shaken hard. Therefore, choice B gives the best analogy.
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