Fact 1: Dropping an object into water causes vibrations in the water.

Fact 2: Sound vibrations can be compared to pond ripples.

Given the two facts above, answer the question "dropping an object into water causes what?" with the following options: 
- pond ripples
 - pond scum
 - chemical changes
 - heat energy
 - kinetic energy
 - activation energy
 - color changes
 - towels fluffed


 

 pond ripples        