1. C1: Chemistry: The Science of Matter
Section 1: The Puzzle of Matter

2. Section 1 Vocabulary Chemistry Physical change Matter Chemical change
Mass Solution
Property Alloy
Scientific Model Solute
Qualitative Solvent
Quantitative Aqueous Solution
Substance Element
Mixture Compound
Formula

3. Picture of Matter
Chemistry is the science that explains the structure and properties of matter.
What is Matter?
Examples:
Water
Popcorn
Bus

4. Matter The submicroscopic view of matter:
Those tiny balls represent atoms!

5. Models
Models connect the macroscopic (macro=big)and microscopic (micro=small) views.

6. Classifying Matter Qualitative observation: Made without measurement
Examples: Color, size, shape.
What qualitative things do you see?

7. Classifying Matter cont…
Quantitative observations uses measurements
Examples: Mass or weight, time, temperature

8. Pure Substance v. Mixture
Pure substance is matter with the same fixed composition and properties.
Examples: A bag of sugar, glass, pure water
Which of the following shows a pure substance?

9. Mixture (mixed matter)
A mixture is a combination of two or more substances (two substances don’t interact)
Examples: sand and sugar, dirt, blood, milk.

10. How can you separate mixtures?
Physical properties/change: characteristics or changes of matter that don’t change its identity.
Separate the Chex mix physically by size, shape, floatation?

11. Two kinds of Mixtures Heterogeneous Mixtures – different compositions
Hetero = different
Homogeneous Mixtures – same compositions
Homo = same

12. Homogeneous or Heterogeneous?

13. Homogeneous=solutions
Solutions contain two parts (solute and a solvent)
Example = Gatorade
Solute = substance being dissolved
Example = Sugar/electrolytes
Solvent = Dissolves solvent
Example = Water

14. Other Mixtures Alloys = solid solutions that contain different metals.
Examples: Spinners, brass, stainless steel

15. Why mix metals?

16. Pure Substances
Elements = cannot be broken down into simpler substance
Building block for other forms of matter
All substances are made from elements
See Periodic Table (all known elements)

18. Compound (another pure substance)
Compounds = Can be broken down into elements
Elements are bonded together in fixed proportions
Examples: H2O, CH4, NaCl

19. Vocabulary Quiz. Matching
Definition
Word Bank (some extra words)
1. A combination of two or more substances in which each part is not changed.
2. Takes up space and has mass.
3. Descriptive observations like color, size and texture
4. The study of matter! Everyone’s favorite class.
5. Characteristics (or properties) of matter that when changed are reversible. Example: metal bending.
Chemistry
Qualitative
Quantitative
Matter
Physical Property
Mixture
Chemical Property
Math

20. C1 Section 2 Vocabulary Volatile Density Chemical property
Chemical change
Chemical reaction
Law of conservation of mass
Energy
Exothermic
endothermic

21. C1 Section 2 Properties and Changes of Matter
States of Matter
Solid
Liquid
Gas
Plasma

23. Plasma

24. Properties of Matter
Volatile = a liquid that can easily change to gas at room temperature
Example = Gasoline

25. Properties of Matter…
Density = Amount of matter contained in a unit of volume
Physical property
Equation: Density = mass/volume

27. Chemical Properties
Chemical Change = changing a substance into another substance
Not easily reversible
Involves chemical reactions
Changes chemical property
Example: Iron rusts

29. Chemical Change and Energy
Energy = capacity to do work
Exothermic = Gives off energy
Feels hot
Endothermic = Absorbs energy
Feels cold

30. C1-2 Vocabulary Quiz Definition Word Bank
The amount of matter per unit of volume (g/mL).
Matter is neither created nor destroyed.
The change of one or more substances into other substances.
A chemical reaction that absorbs energy making the container feel cold.
A chemical reaction that releases energy making the container feel hot.
-Volatile
-Endothermic reaction
-Chemical reaction
-Exothermic reaction
-Law of conservation of mass
-Energy
-Density
-Chemical Reaction