Hypothesis
a testable educated guess
Experiment
how we test hypotheses
Variable
Idea to be tested (only one)
Control
Something the variable is tested against
Experimental protocol
How do you do the test?
Results
Data generated comparing variable to controls. Includes statistics to show
results are meaningful
Conclusion
Interpretation of results
, independent variable
The experimental factor that is manipulated; the variable whose effect is being
studied.
dependent variable
The variable that depends on the independent variable
Protons
Positively charged particles
Neutrons
the particles of the nucleus that have no charge
Electrons
Negatively charged particles
Isotopes
same atomic #
different mass #
Ions
The number of electrons is either greater than, or less than, the number of
protons
atomic mass
Number of protons and neutrons
Neutrons equal
mass number - atomic number
Electrons equal
a testable educated guess
Experiment
how we test hypotheses
Variable
Idea to be tested (only one)
Control
Something the variable is tested against
Experimental protocol
How do you do the test?
Results
Data generated comparing variable to controls. Includes statistics to show
results are meaningful
Conclusion
Interpretation of results
, independent variable
The experimental factor that is manipulated; the variable whose effect is being
studied.
dependent variable
The variable that depends on the independent variable
Protons
Positively charged particles
Neutrons
the particles of the nucleus that have no charge
Electrons
Negatively charged particles
Isotopes
same atomic #
different mass #
Ions
The number of electrons is either greater than, or less than, the number of
protons
atomic mass
Number of protons and neutrons
Neutrons equal
mass number - atomic number
Electrons equal
