Thinking logically, make observation and use logic, assess claims, make judgments on the basis of objective and supported reasons
Using the scientific method
make an observationand form a hypothesis about your observation.
only one variable can be changed in an experiment or your results will be invalid
When all other variables must remain the same
When a variable remains the same
What do scientists use to test a hypothesis?
Can an experiment be a failure?
Nor you may get results you don't expect, but revise hypothsesis & test again
Examples of scientific tools?
eyes , radio telescopes, particle accelerators.
What is SI based on ?
Si Intermination System of Units, metric system
Why use SI ?
How do you measure temperature?
How do you measure electric current?
How do you measure amount of substance?
How do you measure luminous instensity?