Bar Codes and Lasers

Bar Codes and Lasers

Let's review what we have learned this week.

Multiple Choice

Who invented the bar code?

• Grocery stores

• A scientist: Albert Einstein

• Two engineers: Bernard Silver and Joseph Woodland

• Walmart

Multiple Select

Without bar codes, what did stores have to do by hand? SELECT 2 ANSWERS

• have price tags

• record production information

• keep inventory

• stock shelves

Multiple Select

What information is encoded in the bar code? SELECT 3 ANSWERS

• price

• size

• how much someone spent at the store

• how many enter and leave the store

• who put the item on the shelf

Fill in the Blanks

What is used to scan the bar code?

Open Ended

How are bar codes used today? Name at least 1 example.

Multiple Choice

Who invented the first working laser?

• Albert Einstein

• Charles Towne

• Theodore L. Maimain

Multiple Select

Check all the things lasers CAN do.

• Read discs

• Light up a room

• Cut metal or fabric

• Use in surgery

• Scan bar codes