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.
After completing this tutorial, you will be able to complete the following:
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.
|Approximate Time||2 Minutes|
|Pre-requisite Concepts||Students should be able to define the following terms: density, floating, and sinking.|
|Type of Tutorial||Animation|
|Key Vocabulary||density, floating, sinking|