Codes and Ciphers

If we use an algorithm to scramble letters in the alphabet, we are using a:

• code

• cipher

• QR code

• language

... --- ...

• Caesar Cipher

• Morse Code

• Reverse-Alpha

• Braille

a b c d ... w x y z

z y x w ... d c b a

• Caesar Cipher

• Popcorn

• Reverse-Alpha

• Braille

a b c d ... w x y z

a c e g ... h f d b

• Caesar Cipher

• Popcorn

• Reverse-Alpha

• Braille

• Bar Code

• Zip Code

• Sign Language

• QR Code

• Bar Code

• Zip Code

• Sign Language

• QR Code

Corning, New York 14830

• Bar Code

• Zip Code

• Sign Language

• QR Code

a b c d ... w x y z

d e f g .... z a b c

• Caesar Cipher

• Popcorn

• Reverse-Alpha

• Braille

The number system we use for almost everything is: (more than one answer!)

• base-2

• decimal

• base-10

• binary code

Binary number: 0000 0011 equals what number in Decimal form?

• 11

• 2

• 3

• 4