Essential Questions• What is a mixture?• What is a solution?• What is the difference between a mixture

and a solution?• What substances are/are not soluble in

water?

How many of you like trail mix?

In this trail mix you will see M&M’s, chocolate chips, raisins, & nuts. If you like ONLY M&M’s, you can pick out just the M&M’s. All of these ingredients can be

separated- which makes it a MIXTURE.

Mixtures• A mixture is two or more substances that

are combined without changing any of them.

Look at this salad- what

makes this salad a mixture? You can separate all the ingredients: Tomatoes, cucumbers, onions, lettuce,and bean sprouts- and its still a salad.

Mixtures• The substances in a mixture aren’t

permanently combined and their properties don’t change.

• Items used in a mixture can be separated. Like in a pizza, if you don’t like pepperoni- you can pick them off- but it’s still a pizza!

Mixtures• Not all mixtures are solids- think of salt water. If you mix salt and water, it seems

like you can’t separate them- but you can. If you boil water, the water evaporates leaving the salt behind.

• Sand at the beach is also a mixture of small rocks, shells, and other materials.

Mixtures

Everything can be separated intodifferent parts. This is what makesit a mixture.

Solutions• Now that you have a solid understanding

of what a mixture is, lets move on to solutions.

• Think about making sweetened iced tea.

Solutions• A solution is two or more substances that

are combined changing the original substance. You cannot separate the ingredients in a solution.

• Solutions are actually a type of mixture• With iced tea, you cannot separate the tea

(brown coloring) that’s been added to the water. You also cannot separate the sugar.

Remember, In a mixture- substances can be separated- Solutions can not!

http://www.harcourtschool.com/activity/mixture/mixture.htmlhttp://www.bbc.co.uk/schools/ks2bitesize/science/materials/

reversible_irreversible_changes/play.shtml (physical and chemical changes – read

What Would Happen…

if you added sand to water? Would it dissolve?

No- Sand does not dissolve in water rather the particles fall

to the bottom of the container. Sand in water is NOT a

solution.

Solubility• You will see in today’s

investigation that substances dissolve differently.

• Solubility is the measure of how well one substance dissolves in another. – Ex. Salad Dressing- As you’ve

already learned, oil and water cannot dissolve in each other. Oil is not soluble in water.

– Same with sand- Sand is not soluble in water therefore the solubility is zero!

Which of these is a mixture?

A. Apple

B. Broccoli

C. Ham sandwich

D. Carrot stick

Let’s Review

Which of these is a mixture?

A. Pail of sand and soil

B. Copper wire

C. Ring of pure gold

D. Pinch of salt

Let’s Review

Which of these is an example of a solution?

A. Granola

B. Iced tea

C. Pizza

D. Salad

Let’s Review

Name a substance besides sand and oil that are not

soluble in water.

Let’s Review

• Using a Venn Diagram, compare and contrast mixtures and solutions.

Let’s Review

Mixtures

Solutions