Quiz #1 Flashcards
What is step one?
Identify a problem
Ask a question(s)
How many steps are there in the scientific method?
7
What is step two?
Collect information about the problem
Research (get educated)
What is step three?
Create a hypothesis
Educated guess (answer)
What is step four?
Test the hypothesis
Experiment
What is step five?
Make observations
- measurements and numbers
- –> analyze —> “paint a picture”
What is step six?
Come to a conclusion
From data analysis—> Logical (makes sense/matches data)
What is step seven?
Revise the hypothesis and retest
Revise when hypothesis is wrong
Retest every experiment
What is LOGIC
thought patterns match data/evidence
Parts of an Experiment
Constant, Independent, and Dependent variable, and Experimental Error, and Sample Size, and Statistics, graphs, and charts
Constant variables
stays the same for each test specimen/group
independent variables
changes; the test
dependent variables
measurement/data of or from test
Need to have in exp.?
control group
Experimental Error
unavoidable uncontrollable error
sample size
number of test subjects
statistics graphs and charts
data analysis is always a graph
5 most important graphing rules
1 label with proper units 2 y-axis is dependent variable 3 x-axis is independent variable 4 equal increments 5 use appropriate graph
when do you use a pie chart
when using percentages
when do you use a bar graph?
comparisons
\
when do you use a line graph?
when trying to show change over time
what is a line graph
best shows relationship between two variables
has one or more lines connecting a series of points
x-axis has the most consistent variable in the experiment
y-axis will have another variable
what is a bar graph
x and y axis
uses columns
on some bar graphs the x-axis has labels rather than a numerical scale
used only to show comparisons
what is a pie chart
“part of the whole”
percentage
