WELCOME BACK!1. Please put your name sign on your desk.2. Please pass the signed safety contract to the front of your row.3. Please put your APES Guidelines (aka the fine print) out on your desk where I can see it.4. Please read the board.

Thanks!

CLASS SYSTEMS

Our standards for success: focus and respect.

Regroup signal Objective Sheets

Focus – it’s a good thing.

“THE GREAT TRAGEDY OF SCIENCE – THE SLAYING OF A BEAUTIFUL HYPOTHESIS BY AN UGLY FACT.”

- THOMAS HUXLEY

What does this statement mean to you?

OBSERVATION & 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 see a student take a big bite of a burger• I see the student spit the bite out

Inference = ?

SCIENTISTS NEED TO SEPARATE OBSERVATIONS FROM INFERENCES

As you look at the image on the next slide, write three observations on your board. Try not to write an inference!

Look at this illustration.

On your board, list 3 OBSERVATIONS

On your board, make two INFERENCES

EXPLAIN THE DIFFERENCE AGAIN?!

Observations Inferences

NOW LET’S USE MORE REALISTIC EXAMPLES

“WHAT YOU DIDN’T KNOW ABOUT YOUR BOTTLED WATER”; BEFORE IT’S NEWS; WWW.BEFOREITSNEWS.COM; 6/12/13; ACCESSED 8/27/13

HORNED LIZARD DATA

SUMMARIZE WHAT YOU LEARNED

What is the difference between an observation and an inference?

Why is it important that scientists separate the two? (Or, why would it be bad if scientists moved too quickly to an inference?)

“The great tragedy of science – the slaying of a beautiful hypothesis by an ugly fact.”

- Thomas Huxley

HOMEWORK TONIGHT

Complete Prelab Bring back signed contract Class donation/gather personal materials