1. Chemistry : Introduction to Matter
1.1 Describing Matter

2. matter Anything that has mass and takes up space
Hold up something that is an example of matter.

3. Write 3 examples of substances.
Properties of Matter
Chemistry - the study of the properties of matter & how matter changes
Substance
a single kind of matter that is pure
Always has a specific make-up & specific set of properties.
Write 3 examples of substances.

4. What are the 2 kinds of properties every form of matter has?
Physical Properties & Chemical Properties

5. Physical Properties
A characteristic of a pure substance that can be observed w/out changing it into another substance
Ex: water freezing (solid), water (liquid), water vapor (gas)
Hardness, texture, color, ability to dissolve, luster, conductivity, magnetism, flexibility
Physical properties can be used to classify matter.

6. Chemical Properties
A characteristic of a pure substance that describes its ability to change into different substances
To do this you must try to change it into another substance.
Flammability, oxidation, tarnishing
Chemical properties be used to classify matter.

7. Chemical Properties
When wood burns, what element does it combine with?
Oxygen!
Flammability is a chemical property of wood.

8. Chemical Properties What new substances are produced? Carbon dioxide
& ash
Flammability is a chemical property of wood.

9. Chemical Properties
When iron rusts, what element does it combine with?
Oxidation is a chemical property of iron.
Oxygen!

10. Chemical Properties What new substance is produced? Rust
AKA Iron oxide!
Oxidation is a chemical property of iron.

11. Element – pure substance that cannot be broken down into any other substance

12. How can you tell one element from another?

13. How can you tell one element from another?
By their
chemical & physical properties!

14. Atoms The basic particle from which all elements are made.
building blocks of matter
Can combine w/ other atoms through chemical bonds
Molecules – groups of 2 or more atoms held together by chemical bonds

15. Meet Molly Cule
Pop star Molly Cule has dropped her car off at Ms. Frizzle’s car wash before her concert. We join her class just after they were shrunk to examine the dirt on the car AFTER it was washed.
Click picture for 5 minute video

16. Atoms In this figure, what does each sphere represent? An atom
How many atoms in a molecule of water?
3 atoms
How many atoms in a molecule of oxygen?
2 atoms

17. Atoms What elements make up water? Hydrogen and oxygen
What elements make up carbon dioxide?
Carbon & oxygen
What holds atoms together?
Chemical bonds

18. Compounds
A pure substance made of 2 or more elements chemically bonded together
When elements combine, they form compounds w/ different properties than their original properties.
What is the ratio of atoms in these compounds?
CO2 CO H2O
1 to 2
1 to 1
2 to 1

19. 100 Greatest Discoveries Let’s review oxygen, atoms & molecules
Click here for this 8 minute video.

20. Mixtures
2 or more substances together in the same place but not chemically combined
Each substance keeps its original properties

21. Heterogeneous mixture
Easily separated
You can see all the different parts
Which of these pictures shows a heterogeneous mixture?

22. Homogeneous mixture
Mixed so evenly you cannot see all the different parts
Which of these pictures shows a homogeneous mixture?

23. Heterogeneous OR Homogeneous?
Sugar water
salad
brass
air
homogeneous
homogeneous

24. Separating Mixtures
Easy to do because each component keeps its own properties
Separate through magnetic attraction, filtration, distillation or evaporation (see fig. 10)

25. And now back to Ms. Frizzle’s class…
Click picture for the 5 minute continuation of the Magic School Bus video.