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36 Cards in this Set

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What is science?
A system of knowledge and methods used to find information beginning with curiosity and ends with discovery.
Scientia
What is technology?
The use of knowledge to solve practical problems.
Scientific Method
An organized plan for gathering, organizing, and communicating information.
Scientific hypothesis
An educated guess or a reasonable explanation that can be tested by experiment.
Scientific theory
A well-tested explanation for a set of observations or experimental results.
Example - Big Bang Theory
Scientific law
A general hypothesis that has been tested over and over again and has not been contradicted.
Fact
A phenomenon about which competent observers can agree.
1st Step of the Scientific Method
Make observations and ask questions.
2nd Step of the Scientific Method
Develop a hypothesis or a proposed answer to the question.
3rd Step of the Scientific Method
Test the hypothesis with an experiment.
Manipulated variable
Variable that causes a change in another.
Responding variable
Variable that changes in response to the manipulated variable.
Controlled variable
All other variables are kept constant or controlled.
4th Step of the Scientific Method
Analyze data and draw conclusions.
5th Step of the Scientific Method
Develop a scientific theory/ Arrive at a scientific law.
SI Base Unit for length
meter (m)
SI Base Unit for mass
kilogram (kg)
SI Base Unit for temperature
kelvin (K)
SI Base Unit for time
second (s)
SI Base Unit for amount of substance
mole (mol)
SI Base Unit for electric current
ampere (A)
SI Base Unit for luminous intensity
candela (cd)
Mass
A measurement of the quantity of matter in an object.
Volume
The amount of space occupied by an object.
°F to °C
°C=5/9(°F-32)
°C to °F
°F=9/5(°C) +32
°C to K
K=°C+273
Precision
How close together a group of measurements actually are to each other.
Accuracy
How close the measured value is to the true or accepted value.
Random Error (Indetermediate Error)
Measurement has an equal probability of being high or low.
Systematic Error (Determinate Error)
Occurs in the same direction each time (high or low), often resulting from poor technique
Data tables
Relate two variables:
Manipulative variable (ex. time) - x-axis
Responding variable (ex. temperature) - y-axis
Line graphs
Show changes that occur in related variables.
Slope
Rise/Run=(y₂-y₁)/ (x₂-x₁)
Direct Proportion
A relationship in which the ratio (x/y) of two variables is a constant.
As one variable (x) increases, the other variable (y) increases.
Indirect Proportion
A relationship in which the product of two variables (x.y) is a constant.
As one variable (x) increases, the other variable (y) decreases.