1. Welcome to Chemistry!
Mrs. Charniauskaya

2. Scientific Method

3. Scientific Method Observation, gathering information
Hypothesis – possible explanation for an observation
Designing and performing an experiment.
Collecting data to check if hypothesis is valid/correct.
Qualitative data (describes quality).
Example: This desk is wide.
Quantitative data (describes quantity).
Example: This desk has a width of 9 ft.
Analysis of data.
Conclusion – summarizes and presents the result of the experiment.
Conclusion can develop into theory and law.
What is a difference between the theory and the law????

4. Theory and law Law is a description of a phenomenon.
Law states what happens.
Example:
Law says that apples always fall downward and lets calculate the speed of fall.
Law does not explain why apples always fall down.
Theory is an explanation of a natural phenomenon based on many observation and investigation over time.
Theory attempts to explain why something happens.
Theory explains that apple falls downward because of the gravitational force.