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Teacher instructions • No printing required, need piece of paper, pen or pencil, internet connection for video. • After slide 3, have students share their observations/inferences. Question is that an observation or an inference? Do the same for slides 4 and 5.
Observations & InferencesWhat are they? modified by Liz LaRosa www.middleschoolscience.com 2009, from original posted at:www.science-class.net/PowerPoints/Observation_Inference_8th.ppt
Look at these two sets of animal tracks. On your piece of paper List 3 OBSERVATIONS and Make an INFERENCE
Now what do you think? Again make 3 OBSERVATIONS And an INFERENCE
Now what do you think? Make 3 OBSERVATIONS Make an INFERENCE
Observations • Any information collected with the senses. • Quantitative – measureable or countable • 3 meters long • 4 marbles • 50 kilograms • 35 degrees Celsius • Qualitative – describable, not measureable • red flowers • smells like fresh baked cookies • Tastes bitter • Heard a loud “pop” • The skill of describing scientific events
Inference • Conclusions or deductions based on observations. • The process of drawing a conclusion from given evidence. Practice: • Observations: • I hear people screaming • I smell cotton candy, popcorn, and hamburgers • I see a lot of people • Inference = ?
With a partner… • Verify that it is an observation using the definition of observation. • Verify that it is an inference using the definition of inference.
What really happened? • http://www.youtube.com/watch?v=Bp-H8e41fJI • Things are not always what they seem. • Observations are useful in science but to make a valid inference requires going through the scientific method.
Source of graphic:http://bob.nap.edu/html/evolution98/evol6-e.html