1. Observation & Inference
modified by Liz LaRosa , from original posted at:

2. Observations Any information collected with the senses.
The skill of describing scientific events
2 Types:
Quantitative – measureable or countable
3 meters long
4 marbles
50 kilograms
35 degrees Celsius
Qualitative – descriptive, not measureable
red flowers
smells like fresh baked cookies
Tastes bitter

3. Inference
Conclusions or deductions based on observations.
The process of drawing a conclusion from given evidence or observation.
Practice:
Observations:
I hear people screaming
I smell cotton candy, popcorn, and hamburgers
I see a lot of people
Inference = ?

4. Note the Difference! In a lab, record observations- NOT inferences
Inferences should 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
Yes
Blue
Yard Sale
35 mph No

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

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

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

18. Activity Page
In your science notebook, write your conclusion (at least three sentences).

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

20. On the Back
How many hours/minutes did you study for the test? (outside of class)
Did you feel prepared?
What was your grade?
What did you expect to get?
What can you do differently for the next test?