1. Math Booster: There are. 621 miles in one km
Math Booster: There are .621 miles in one km. How many km is it to “Arbys” if the distance is 6.3 miles?
Hint: This is a conversion problem.

2. There are. 621 miles in one km
There are .621 miles in one km. How many km is it to “Arbys” if the distance is 6.3 miles?

3. JQ: What is the difference between homogeneous and heterogeneous matter?

5. Is it uniform throughout?
If the answer is no, the matter is a heterogeneous mixture.
Considered the “least mixed.”
Does not appear to be the same throughout.
Particles are large enough to be seen and to be separated from the mixture.

6. Examples of heterogeneous mixtures
Sand and pebbles
Oil and water
Granite

7. Is it uniform throughout?
If the answer is yes, the matter is homogeneous (looks the same throughout).
That leads us to another question.

8. Can it be separated by physical means?
If the answer is yes, the matter is a homogeneous mixture or solution.

9. Homogeneous Mixtures A mixture that appears to be the same throughout.
It is “well mixed.”
The particles that make up the mixture are very small and not easily recognizable.

10. Colloids
In a colloid the particles are mixed together but not dissolved.

12. Solutions
A solution is a type of homogeneous mixture formed when one substance dissolves in another.
It is the best mixed of all mixtures.
A solution always has a substance that is dissolved and a substance that does the dissolving.
The substance that is dissolved is the solute and the substance that does the dissolving is the solvent.

13. Ocean water is a solution

14. The universal solvent: Water

15. Water as a solvent Many liquid solutions contain water as the solvent.
Ocean water is basically a water solution that contains many salts.
Body fluids are also water solutions.

16. Metals dissolved in metals are called alloys.
Types of solutions
Solute
Solvent
Example
Gas
Air (oxygen in nitrogen)
Liquid
Soda water (carbon dioxide in water)
Solid
Ocean water (salt in water)
Solid
Gold jewelry (copper in gold)
Metals dissolved in metals are called alloys.

17. Air is a solution of oxygen and other gases dissolved in nitrogen

18. Alloys Stainless steel is a mixture of iron and chromium.
Brass is an alloy of copper
and zinc.

20. Can it be separated by physical means?
If the answer is no, the matter is a pure substance.
An element
Or a compound

21. Elements Elements are the simplest pure substance.
An element can not be changed into a simpler substance by heating or any chemical process.
The smallest particle of an element that has the properties of that element is called an atom.
An atom is the basic building block of matter.
There are more than one hundred known elements in the universe listed on the periodic table of elements.
These elements combine in such a way to create millions of compounds.

22. Elements All elements are made of atoms.
Atoms of the same element are alike.
Atoms of different elements are different.

23. Common Elements Aluminum Al Bromine Br Calcium Ca Carbon C Gold Au
Helium He
Hydrogen H
Nitrogen N

24. What if you combined 2 atoms of Fe? How would this be written?
What if you combined 2 atoms of hydrogen with 1 atom of oxygen?
H2O

25. Compounds Compounds are also pure substances.
But compounds are made from more than one element.
Water is a compound.
Water can be broken down into simpler substances – hydrogen and oxygen.

26. Group Activity Read over the instructions
Discussion about instructions
Group roles: Decide who will do what (EVERYONE Contributes!)
Look at the container – It must be returned in the SAME condition
Monkey Business = Dismiss from group
Zero w/no make-up!

27. What must be done today:
Assemble all elements, compounds, & mixtures
Using colored pencils, complete the observation portion (after teacher approval)
Disassemble & return as you found the kit
Analysis Questions

28. Clean-Up Candy must be disassembled when finished & returned to bag
Used toothpicks should be thrown in trash
Count to be sure you have all candy in bag:
Red = 18 Green = 6
Yellow = 20 Purple = 6
Orange = 4