MONDAY 8/26/13

Questions to be answered in class:

• What are the 3 main kinds of experimental variables?
• What is the difference between qualitative and quantitative observations?
• How do you write a lab?

Note: When writing in carbon paper journal, put plastic card in between pages so the writing does not bleed through.

When Using the Textbook to Read

• Reading Matters
• Read the textbook 
• Look at diagrams
• Think about the reading
• Use the book to complete handouts
• Handouts given in class:
• Ch. 1.1 - Types of matter
• Ch. 1.2 - Measurements

Note: The purpose of today's lab is to familiarize you with being in the lab. Also to get you used to isolating variables

What are the 3 main types of variables? and What are Quantitative and Qualitative Observations?

• Independent Variable
• What I change (As experimenter)
• Dependent Variable
• Data
• What I observe and measure
• Qualitative Observations
• No numbers
• Quantitative Observations
• Has numbers and measurements
• Controlled Variable
• Everything you try to keep the same from trial to trial

How to Write a Lab

• When performing a lab, keep it neat enough for yourself to read because you will not be turning it in.
• You will turn in the lab notebook with carbon pages so do make that one neat.

Review: You can be messy on your copy of the lab, but must be neat on the copy you are turning in.

Lab Notebook Appearance 

• Title
• Name
• Lab partner's name
• Purpose of the lab
• Section on data
• Calculations (Which are not on today's lab)
• Post Lab Questions - Complete sentences, and do not rewrite questions, keep them numbered
• Conclusion (Not in today's lab) 

Today's Lab 

Observation Lab

Pre-Lab

• Don't be biased 
• Being biased is not a characteristic of the scientific method

After the procedure fill out the data with your results

Original substances and observations:

• Calcium Chloride
• White, powdery, little balls, smells like chlorine
• Sodium Bicarbonate
• White, powdery, no smell
• Phenol Red
• Red, transparent, smells like rubbing alcohol
• 5 ml. of water
• Clear, odorless

Result of all four substances combined:

• Yellow, warm then cold, bubbly 

Rest of lab is combinations between W (water), Calcium Chloride (C), Sodium Bicarbonate (S), and Phenol Red (R)

• C+S= Hot to cold
• C+R= Gets red and warm
• C+W= Gets warm and watery
• S+W= Gets Milky

The rest of the lab was the post lab questions. I am not sure if I am to write those also. The lab can be found on moodle on our class page under handouts. 

Thank you; that is all for me. 

The next scribe will be Conrad Mordsinski