In 1930, Scotch tape was developed by Richard G. Drew at 3M, St. Paul Minn. Originally, 3M only made sandpaper, and during testing Drew observed at a local auto body shop that auto painters had difficulty making clean dividing lines on two-color paint jobs. After two years of effort in the company's labs, he invented masking tape (1925), a tan paper tape with a light, pressure sensitive adhesive backing. Five years later, he invented Scotch Brand Cellulose Tape, the first waterproof, see-through, pressure-sensitive tape. Once marketed, the public found the tape had a wide range popular applications in mending, sealing and joining. These financial successes stimulated the company to increase product research and development.

September 8th, 2015 •NOS Quiz

Objectives

• Take Nature of Science Quiz• Lab Safety

Assessment Expectations!• Remain quiet during and after your assessment.• Remain seated. Turn your assessment over when

finished. I will pick them up at the end of class. • Remain busy. Find something else to work on.

September 8th, 2015

Homework• Work on Book readings for Friday.

What to bring to the lab?

• Lab handout/work sheet

• Pencil• Calculator or

Periodic Table (if needed)

What not to bring to the lab…

• Books• Purses• Etc.

Follow instructions

• Written• Oral• Eye contact is

requested• LISTEN

Wear appropriate clothing

• Jackets and loose garments• Open-toed shoes• Tie hair back

Safety Goggles

• Wear them when working with chemicals, heat, etc.

• Wash out eyes for 15-20 minutes

The brown tissue is permanent scar tissue from an acid burn.

Six weeks after an acid burn.

Nine months after injury.

Same eye, one year later.

“The Dead Fish Eye”

Chemicals

• Waft with your hand• Do not breathe fumes directly

Handle all chemicals carefully

• Read directions• Read labels• Do not mix chemicals unless directed to do

so

Avoid touching chemicals with your hands

• Wash your hands right away with soap and water

Unwashed hands can transfer chemicals to the neck or face.

Emergency Equipment

• Fire blanket• Fire extinguisher• Safety shower• Eye wash station

BROKEN GLASS

• Move away• Tell Mr. Sandquist• Let the teacher dispose of broken

glass

Stitches

Clean up• Wet and dry• Wipe down the

tables• DO NOT leave a

mess.• Most chemicals

can be washed down the sink or put in the trash.

Food/Drinks

• No food or drink in the lab area, including gum.

• Never drink out of lab glassware.

Rules for handling unused chemicals

• If the chemicals have only touched the scoop, then you can return the unused portion to the reagent bottle.

• If the chemicals have touched anything else (weighing dish, lab table, beaker, etc.), then you must dispose of the unused chemicals.

Using Heat• Be care when

using heat!• Keep all

combustible materials away from open flames.

• Do not leave an open flame unattended.

RESPECT

• The back room, closets and cabinets are off limits to students (unless given permission by Mr. Sandquist).

• Do not disturb lab set-ups for other classes.

Avoid excited or quick movements

• Use two hands when transporting materials

• Report any unsafe conditions

• Irrational behavior is unacceptable

• Be cautious• Lab safety is serious

business

Closing

•Book readings are due Friday.

Assignment • Complete Lab Safety Worksheet