Science refers to a system of acquiring knowledge. This system uses observation and experimentation to describe and explain natural phenomena. The term science also refers to the organized body of knowledge people have gained using that system .
What is Physical Science?
The science of matter and energy and their interactions
The system used throughout most of the world is SI or the metric system.
Check out the prefixes in table 1.3
Why use it?
Length - meter
Volume - m^3
Mass - kg
Density - g/cm^3
Temp. - Celsius
Time - seconds
Data: Information scientists gather
Science Skills: Observe, Infer, Estimate, Measure, Predict, Classify, Hypothesize, Record and Organize, Analyze
Constant: Stays the same
Variable: Thing that is changed in the experiment
Designing and planning an experiment
Look at the steps and write them as efficiently as possible. Focus on information you don’t know
Fact, Theory, Laws
Fact is a true statement
Law describes how event occurs
Theory describes why event occurs
What do Scientists do?
What skills do they need?
How do they solve problems?
SI units: What are they?
What do the prefixes mean?
Length - meter - m
Volume - cubic meter/liter - cm 3 and l
Mass and weight - kilogram - kg
Density - mass divided by volume - g/cm 3
How much matter is packed into a given space
Temperature - Celsius - o C
Time - Seconds- s
What is it?
Why is it useful?
Practice problems page 15
Three kinds of graphs
1. Circle Graphs
2. Bar Graphs
3. Line Graphs
Give an example of when each kind of graph would be useful.
1.4 Science Technology and Tools
The study of matter can be identified as two connected sciences, chemistry and physics
What is the difference between physics and chemistry?
Sometimes technology is referred to as applied science
What are three examples of tools that scientists use to observe things?