Quiz #1 - experimental design & scientific method

Define the following terms:

Independent variable -

the variable you change

Define the following terms:’

Dependent variable -

what is measured from the results/outcome

Define the following terms:

Constant variable -

stays the same throughout the experiment

Define the following terms:

Positive control -

expected positive change

Define the following terms:

Negative control -

not expected to produce a change

Define the following terms:

Replicates -

multiple samples during experiment to test accuracy

Describe the difference between quantitative and qualitative.

quantitative - quantity/numbers

qualitative - quality/observations

Describe the difference between subjective and objective.

subjective - opinion

objective - fact

Describe the differences between hypothesis, prediction, and conclusion.

hypothesis - why you think you’ll make your prediction

prediction - what you think you will observe in your experiment

conclusion - the overall summary/answer

When should a line graph be used? A bar graph?

line graph - when the variable plotted along the x-axis is continuous. (time, temp. etc.)

bar graph - relationships between different sets of data. (averages.)