1. What is chemistry????

2. Varies dependent on gravity
Chemistry- the science that investigates and explains the structure and properties of matter
Matter is anything that has mass and volume.
Mass is the amount of matter
Volume is the amount of space an object occupies.
MASS  WEIGHT
Mass
Weight
Constant
Varies dependent on gravity
Measured on a balance
Measured on a scale

3. E = mc2 Can this law be broken????
LAW OF CONSERVATION OF MASS (Lavoisier)- Matter (Mass) can not be created nor destroyed; just changed/transformed.
Can this law be broken????
E = mc2
Matter exists in 6 phases.
Bose-Einstein Condensate
Solid*
Liquid*
Aqueous* (dissolved in water)
Gas*
Plasma
Neutron star

5. A solid is matter with a fixed volume and shape that does not change much with temperature. Atoms and molecules are held tightly in a rigid structure.
A liquid has a fixed volume but NOT a fixed shape. It conforms to the shape of the container. Its volume changes somewhat with changes in temperature. The particles in a liquid are not held together in a rigid manner; they can slip past one another.
A gas has neither a fixed shape nor fixed volume. It expands to fill its container completely; its volume is very sensitive to temperature and pressure. A gas’ particles are not held to one another

6. Matter can be characterized according to its properties (characteristics), which can be either physical or chemical.
Physical properties can be measured and observed without changing the substance.
Examples: color, texture, shape, odor, phase, length, mass
Chemical properties are properties that are measured when a substance interacts when in contact with other materials
Examples: flammability, reactivity

7. When we examine matter we make observations.
Observation vs. Inference
An observation is made using your senses. (sight, hearing, touch, etc.) You gather facts about something.
An inference is similar to a conclusion. It is a prediction.
Example:
When piece of paper burns, it releases a visible gas.
The gas is smoke, a mixture of carbon dioxide and water.
Observation
Inference

8. Observations can be of two types:
Qualitative and Quantitative
A quantitative observation is one that involves numerical data.
(quantity means amount = number)  
A qualitative observation does not.
Chemistry involves both qualitative and quantitative observations.  
Quantitative observations are more exact than qualitative.
We will focus on quantitative observations.

10. Classify the following as either quantitative or qualitative observations.
My eyes are brown
The most popular color for a new car in 2000 was silver  
My neck size is 17 inches
My average grade last year was 84%  
Physics is a difficult subject