Sprinkle some salt into a glass of water, watch what happens over the next minute or two, and then take a swig. Actually, make that a sip not a swig, since the water will be pretty...um...salty.
Between the sprinkle and the sip, the salt dissolved into the water, meaning that the substances combined, the water became cloudy, and tasted--well, you know the rest. Of course, not all substances behave like salt does when it hits water. Gold, for example, requires acid to dissolve, and some matter does not fall apart completely, in any liquid.
Watch this video to find out more about solubility, one of the physical properties of matter. Then, answer the question under Take Notes, below. You may read the transcript to the video, and watch it as many times as you like.
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At some point in their lives, 20% of those who own a smartphone will drop it in… Well, you get the picture.
We don’t have exact statistics on how often someone does this, but it happens a lot too.
There might be damage, but don’t lose hope completely—smartphones don’t dissolve in water, like sugar, salt, or whatever this is.
Some of the parts that make up a smartphone, such as gold, are soluble in certain fluids—left in this liquid acid long enough, for example, this 24-carat necklace would dissolve altogether. But an entire smartphone won’t disappear completely…even when this happens.
In this lesson you will learn some basic information about the physical properties that define different types of matter. You’ll watch a short video and then two animations that explain these physical properties and how they are unique for each substance. After taking notes and online quizzes, you’ll have a chance to review and organize what you’ve learned. Then you will produce your own project in which you’ll describe the ways in which physical properties are observed, measured and used to define types of matter.
From the context of the video:
1) Why do you think gold can disappear into liquid acid?
2) Why do you think a smartphone can't disappear completely?
List your answers in the box below. Click SAVE when you have finished. To see your saved or submitted work again, click MY WORK at the top of the page.