Each night you measure your height just before going to bed.When you arise each morning,you measure your height again and consistently find that you are 1 inch taller than you were the night before but only as tall as you were 24 hours ago! Is what happens to your body in this instance best described as a physical change or a chemical change?
A)chemical change because it involves your body
B)physical change because it readily reverses
C)chemical change because it involves changes in your bone structure
D)physical change because water expands as it freezes

Question

Quizplus · Accepted Answer

This is a physical change because it involves a change in height due to the compression and decompression of the spine over the course of the day. It readily reverses when your body decompresses overnight, causing you to be slightly taller again in the morning. There is no chemical reaction occurring in this instance. Choice A and C are incorrect because they involve chemical changes, which are not occurring in this scenario, and choice D is irrelevant to the question being asked.

Each Night You Measure Your Height Just Before Going to Bed.When