get ready! get your handouts grab a text book have a pencil ready sit down! we’ll be starting...
Post on 01-Jan-2016
214 Views
Preview:
TRANSCRIPT
GET READY!
GET YOUR HANDOUTS
GRAB A TEXT BOOK
HAVE A PENCIL READY
SIT DOWN!
WE’LL BE STARTING SOON!
SCIENTIFIC INQUIRY
WHAT IS SCIENTIFIC INQUIRY? P. 10
SCIENTIFIC METHOD
WHAT STEPS OF THE SCIENTIFIC METHOD DID SHELDON AND
LEONARD USE?
CASE STUDY – MINNEAPOLIS BRIDGE
• STEP ONE – QUESTION
• STEP TWO – HYPOTHESIS
• STEP THREE – TEST IT
• STEP FOUR – ANALYZE RESULTS
• STEP FIVE – DRAW A CONCLUSION
• STEP SIX – COMMUNICATION
MINNEAPOLIS BRIDGE
COLLAPSE• WHAT HAPPENED TO THE
BRIDGE IN MINNEAPOLIS?
• WHY WAS THE 2007 BRIDGE FAILURE A SURPRISE
• WHAT CAN A SCIENTIST LEARN FORM STUDYING ACCIDENTS?
• WHAT HYPOTHESIS WOULD YOU TEST FIRST?
EXPERIMENTSTHE HYPOTHESIS MUST BE TESTED!
IDENTIFYING VARIABLES AND CONSTANTS
VARIABLE• ANY FACTOR THAT CAN
HAVE MORE THAN ONE VALUE
• INDEPENDENT VARIABLE – THE FACTOR THAT YOU WANT TO TEST
•DEPENDENT VARIABLE – THE FACTOR YOU OBSERVE OR MEASURE
CONSTANTS
• THE FACTORS IN AN EXPERIMENT THAT DO NOT CHANGE
THINK – PAIR – SHARE
• HOW ARE DEPENDENT AND INDEPENDENT VARIABLES RELATED TO EACH OTHER IN EXPERIMENTS?
• WHAT MIGHT BE THE INDEPENDENT AND DEPENDENT VARIABLES IN AN EXPERIMENT ABOUT A BRIDGE COLLAPSE?
EXPERIMENTAL GROUPS
EXPERIMENTAL GROUP
THIS GROUP IS USED TO DETERMINE HOW A
CHANGE IN THE INDEPENDENT VARIABLE
CHANGES THE DEPENDENT VARIABLE.
CONTROL GROUP
THIS GROUP CONTAINS THE SAME FACTORS AS
THE EXPERIMENTAL GROUP, BUT THE
INDEPENDENT VARIABLE IS NOT CHANGED.
QUESTION
WHY DO EXPERIMENTS NEED A CONTROL GROUP?
GATHERING INFORMATION AND DATA
• QUALITATIVE DATA USES WORDS TO DESCRIBE WHAT IS OBSERVED
• QUANTITATIVE DATA USES NUMBERS TO DESCRIBE WHAT IS OBSERVED
• WHY WOULD QUANTITATIVE DATA BE MORE HELPFUL IN THE BRIDGE INVESTIGATION?
• HOW CAN QUALITATIVE DATA BE HELPFUL IN AN INVESTIGATION?
SKIM PAGES 25-28 IN YOUR TEXT BOOK
• What quantitative and qualitative data did scientists discover?
• What was their conclusion based on their observations?
• BRIDGE FAILURE AND OBSERVATIONS
• ASKING QUESTIONS
• GATHERING INFORMATION AND DATA
• AN EARLY HYPOTHESIS
• COMPUTER MODELING
• REVISING THE HYPOTHESIS
• TESTING THE HYPOTHESIS
ANALYZE YOUR DATA
WHAT ARE YOUR RESULTS AND WHAT DO THEY
MEAN?
ANALYZING THE RESULTS
• TO WHAT DOES DEMAND-TO-CAPACITY RATIO REFER?
• WHY DID INVESTIGATORS CALCULATE THE DEMAND-TO-CAPACITY RATIO FOR EACH OF THE MAIN GUSSET PLATES?
• WHAT DID THE RESULTS OF THE CALCULATIONS FOR THE GUSSET PLATES REVEAL?
• WHY ARE EVALUATION AND TESTING IMPORTANT IN THE DESIGN PROCESS?
FINALLY – APPLICATION OF THE RESULTS AND COMMUNICATION• GIVE THREE EXAMPLES OF THE SCIENTIFIC INQUIRY PROCESS THAT WERE USED
IN THIS INVESTIGATION.
• WHY IS IT IMPORTANT THAT THE RESULTS WERE COMMUNICATED WITH OTHERS?
The new Minneapolis bridge!
5 YEARS AFTER THE TRAGEDY
• WHAT GOOD CAME FROM INVESTIGATING THE TRAGEDY?
• NOW FOR YOUR ASSIGNMENT
• CASE STUDY
• COMMUNICATING RESEARCH RESULTS
• DUE FRIDAY!
top related