Galileo + Errors 🪐➶.✧༄ Flashcards
Who was Galileo Galilei?
Galileo Galilei was an Italian math professor of the 16th Century.
What did Galileo Galilei do?
Galileo Galilei created “OHEC” which is a scientific approach to investigating a problem.
- O: Observation
- H: Hypothesis
- E: Experiment
- C: Conclusion
What are the three types of variables?
The three types of variables are: Independent, Dependent, Controlled.
What is an Independent Variable?
An independent variable is the variable which is being altered/investigated.
What is a dependent variable?
The variable which is affected by a change in the independent variable.
What is a controlled variable?
This is the variable which is kept constant.
In an experiment with three factors; the length of the string, period and mass of bob. Which one is the independent, dependent and controlled variable?
Independent Variable: length of the sting
Dependent Variable: period
Controlled Variable: mass of bob
length and mass are interchangeable as independent and controlled variables.
What is the gradient/slope formula?
The formula is y2-y1/x2-x1
What are the three types of errors in physics?
The three types of errors in physics are:
1. Random Errors
2. Parallax Errors
3. Systematic Errors
What is a Random Error?
A random error is an unpredictable and uncontrollable variation in measurement with an equal chance of the result being greater or lesser.
How can you reduce random errors?
By taking the mean of several readings.
What is a Parallax Error?
A parallax error is essentially a human error which occurs when reading the position of a measurement scale.
How can you reduce a parallax error?
You can:
1. Read from eye-level
2. observations should be made with the line of sight perpendicular to the scale.
What is a Systematic Error?
A systematic error is an error due to an inaccuracy in the measuring instrument and may also be because of the user.
It is a consistent error.
What is the difference between a Systematic Error and a Random Error?
Whilst a systematic error is a consistent error, a random error is random and has an equal chance of giving a greater or lesser result.
