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# ZingPath: Properties of Matter

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## Properties of Matter

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### Lesson Focus

#### Differences in Density: Floating and Sinking

Physical Science

You will investigate two of the fundamental things that make up this world in which we live: matter and energy. Discover the basic properties of matter and how it differs from energy. Learn about magnetism and experiment with density too.

### Now You Know

After completing this tutorial, you will be able to complete the following:

• Classify matter based on relative density.

### Everything You'll Have Covered

What happens to water when it reaches its freezing point?

~ When water reaches it freezing point, its molecules slow down and form a structure with a very clear pattern, called a regular crystalline structure. At this point, the liquid water becomes solid ice.

What happens to water when it reaches its freezing point if you add salt to it?

~ When you add salt to water, the ions that form the salt's structure insert themselves between the water molecules and delay the formation of a regular crystalline structure. As a result, the freezing point of the water is lower.

What are some everyday applications of this method called cryoscopy where salt is used to lower the temperature of water?

~ This form of cryoscopy with salt is used to melt ice on the roads in the winter.

How is alcohol used to decrease the temperature of water?

~ Alcohol is used in the form of antifreeze, which is added to water in car radiators in the winter to prevent it from freezing in cold temperatures.

### Tutorial Details

 Approximate Time 2 Minutes Pre-requisite Concepts Students should be able to define the following terms: density, floating, and sinking. Course Physical Science Type of Tutorial Animation Key Vocabulary density, floating, sinking