1. Observation vs. Inference

2. Observation
A direct method of gathering information in an orderly way (using your senses)

3. Inference
An assumption based on prior experience (a guess based on your observations)

6. Aliens!

7. Technique #2: Grab Sample

8. Grab Sample Lab
You will sample 4 times total

9. Directions – Grab Sample
Using forceps, each group will take 8 sediment samples total (divide it up evenly)
Create a bar graph (using color!) to show the data you collect
You can do 2 graphs on each side of the paper
Label your X & Y Axis and include a Title
*I will collect this so use a new piece of paper

10. Bar Graphs (4) Title X-Axis = Types of sediment
Y-Axis = # of each sediment collected

11. Conclusions 1. In complete sentences, compare your 4 trials:
What can you infer about the sediments on the ocean floor based on your 4 trials?
Explain why scientists do as many trials as possible when conducting research.