Mixture and Solutions

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What is a mixture?

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A mixture is a combination of two or more substances that are not chemically bonded together. Examples include salad, air, and sand.

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What is a solution?

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A solution is a special type of mixture where one substance (the solute) is completely dissolved in another substance (the solvent). For example, saltwater is a solution of salt (solute) in water (solvent).

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What is evaporation?

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Evaporation is the process by which liquid water turns into water vapor (gas) when it is heated. This is how wet clothes dry in the sun.

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS1-4

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What is condensation?

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Condensation is the process by which water vapor cools and changes back into liquid water, forming droplets. This can be seen on a cold glass of water.

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

NGSS.MS-PS1-4

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What is the best method to separate a solution of salt and water?

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The best method is to evaporate the water, leaving the salt behind.

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NGSS.MS-PS3-3

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What is a strainer used for?

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A strainer is a kitchen tool used to separate solid food from liquid, such as draining pasta.

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What happens when you mix oil and water?

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Oil and water do not mix because they are immiscible; they form two separate layers instead of a solution.

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What is thermal energy?

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Thermal energy is the energy that comes from the temperature of matter. It is the energy that causes heat.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

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What is an insulator?

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An insulator is a material that does not conduct heat well, helping to keep heat in or out. Examples include rubber and glass.

Tags

NGSS.MS-PS3-3

Front

What is a solute?

Back

A solute is a substance that is dissolved in a solution. In saltwater, salt is the solute.