The video you viewed introduced you to some important terms, including "soluble" (which is related to solubility), dissolve, and physical properties. Because these words and concepts, along with several others, will be discussed and described during the rest of this lesson, it's a good idea to learn their definitions now.
Boiling Point: The temperature at which a liquid becomes a gas.
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Density: The amount of mass within a given amount of volume. Helium-filled balloons rise because helium is less dense than air.
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Dissolve: The breaking apart of one substance such as salt, into another substance, such as water.
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Mass: the amount of material contained in an object, such as gold.
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Matter: Any physical substance or material that takes up space and has mass. If you can put it in a jar, it’s matter.
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Melting Point: The temperature at which a solid becomes a liquid.
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Physical Properties: Characteristics of matter that can be observed and measured without changing the matter’s chemical makeup.
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Solubility: How much of a substance can dissolve in a liquid
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Volume: How much space a substance takes up.
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Weight: The downward force of gravity on an object.
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Answer the following questions in the note box, below:
1) What is the difference between mass and weight?
2) What is the difference between mass and density?
3) What is the difference between melting point and boiling point?
4) How are mass and volume related to density?