Observation vs. Inference

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

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

Aliens!

Technique #2: Grab Sample

Grab Sample Lab You will sample 4 times total

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

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

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.