Biological Science (7th Edition)
Biological Science (7th Edition)
7th Edition
ISBN: 9780134678320
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
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Chapter 2, Problem 12PIAT

The salty ocean has a higher level of entropy compared to fresh water due to the dissolved ions it contains, which interact with and disperse water molecules. For ice to form in the ocean, this entropy must be reduced to allow the crystalline structure shown in Figure 2.15a to form. If you were to break off a piece of this ice and melt it, would the water taste fresh or salty? Explain your answer.

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In Science experiments, it is very important to “control the variables” so that there is only ONE independent variable and ONE dependent variable. We “control the variables” by making anything else that could change during the experiment into a constant. For example, if you are doing an experiment to find out what material can hold more water, then it is important to make sure all the materials you are testing are the same size. Why is it so important to control the variables? What would happen if we did not control them?
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