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# IGHS Winkels

### Physical Science Chapter 1 (old)

TermDefinition
Science a system of knowledge and the methods you use to find knowledge
Technology the use of knowledge to solve practical problems
Physical Science covers two main areas, chemistry and physics
Chemistry the study of the composition, structure, and properties, and reactions of matter
Physics the study of matter and energy and the interactions between the two through forces and motion
Atoms building blocks that make up matter
Problem a question to be considered, solved, or answered
Hypothesis a possible explanation for a problem using what you know and observe. Must be testable.
Dependent Variable what you measure in the experiment and what is affected during the experiment
Independent Variable the variable you have control over
Constant a factor that does not change when others do
Control the standard by which the test results can be compared
Scientific Theory a well-tested explanation for a set of observations or experimental results
Scientific Law a statement that summarizes a pattern found in nature
Scientific Model make it easier to understand things that might be too difficult to observe directly
Scientific Notation a way of expressing a value as the product of a number between 1 and 10 and a power of 10
Precision a gauge of how exact a measurement is
Accuracy the closeness of a measurement to the actual value of what is being measured
Data Table relates two variables-a manipulated variable and a responding variable
Line Graph is useful for showing changes that occur in related variables
Slope the ratio of a vertical change to the corresponding horizontal change
Circle/Pie Graph shows how a part or share of something relates to the whole
Bar Graph used to compare a set of measurements, amounts, or changes
Direct Proportion a relationship in which the ratio of two variables is constant
Inverse Proportion a relationship in which the product of two variables is a constant
3 branches of natural science Physical Science, Earth and Space Science, Life Science
2 main branches of physical science Chemistry and Physics
PHEACR Problem, Hypothesis, Experiment, Analyze, Conclude Repeat
Meters measures distance
Liters measures volume
Grams measures mass
Fahrenheit water freezes @ 32 degrees water boils @ 212 degrees
Celsius water freezes @ 0 degrees water boils @ 100 degrees
Created by: Winkels