1. Chapter 1 - Intro

2. What is an observation?
When you observe, you become aware of something using one of your senses. Your five senses are smell, taste, sight, touch, and sound. I an observation you simply describe something as it appears.
What is an inference?
When you infer, you make a mental judgment based on observations. Inferences cannot be directly observed. They require thought.

3. Steps in the Scientific Method
1. Observations
Quantitative-involving numbers
Qualitative-not numerical like color or texture.
2. Formulating hypotheses
possible explanation for the observation
3. Performing experiments
gathering new information to decide
whether the hypothesis is valid

4. The fundamental steps of the scientific method.

5. Law vs. Theory A law summarizes what happens;
A theory (model) is an attempt to explain why it happens.

6. The Fundamental SI Units