1. A test of your observation skills… Contributions by D. Padilla, D. Johnson, & E. Marconi For more optical illusions go to: http://www.123opticalillusions.com/

2. Observations Use one or more of the 5 senses to gather information Use one or more of the 5 senses to gather information A noting and recording of…. FACTS!!! A noting and recording of…. FACTS!!! Example: There is one TV in the room. Example: There is one TV in the room.

3. Inferences Logical interpretation based upon prior knowledge and experience Logical interpretation based upon prior knowledge and experience Based upon observations Based upon observations Example: When you entered the room, you most likely inferred that the individual in the front of the room is the teacher. Example: When you entered the room, you most likely inferred that the individual in the front of the room is the teacher.

4. Note the Differences In laboratory exercises, record observations NOT inferences Inferences may be used when writing the conclusion in your lab report. Let’s test your observation skills…

5. Take a good look at this picture

6. Question 1 Are there cars parked on the sides of the road?

7. Question 2 What color is the pickup truck driving in the road?

8. Question 3 Any minivans around?

9. Question 4 What does the blue sign say?

10. Question 5 What's the speed limit?

11. Question 6 Are there any pedestrians on the road?

13. Answers 1.Yes 2.Blue 3.Yes 4.Yard Sale 5.35 mph 6.No

15. modified by Liz LaRosa www.middleschoolscience.com 2009, from original posted at: www.science-class.net/PowerPoints/Observation_Inference_8th.pptwww.middleschoolscience.com www.science-class.net/PowerPoints/Observation_Inference_8th.ppt Observation & Inference

16. 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 The skill of describing scientific events

17. 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 = ?

18. Look at these two sets of animal tracks. List 3 OBSERVATIONS Make an INFERENCE

19. Now what do you think? Make 3 OBSERVATIONS Make an INFERENCE

20. Now what do you think? Make 3 OBSERVATIONS Make an INFERENCE

21. Activity Page www.middleschoolscience.com/footprints-isn.pdf In your science notebook, write your conclusion.

22. Source of graphic: http://bob.nap.edu/html/evolution98/evol6-e.html http://bob.nap.edu/html/evolution98/evol6-e.html