A letter as a pattern of 0s and 1s

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A letter as a pattern of 0s and 1s

Name:
Date:
Class:
A

Quick Questions

Shade in the A or B circle for each question.

1. How does a computer store the letter A?
A As a pattern of 0s and 1s
B As a tiny photo of the letter A
2. Binary code is like a thread of beads. Which fits best?
A Two bead colours: one for 0 and one for 1
B Ten bead colours: one for each digit 0 to 9
3. Which sentence is true about letters in binary code?
A All the letters share the same pattern
B Every letter has its own pattern
4. In a bead code, A = 01, B = 10 and C = 11. Which thread spells CAB?
A 110110
B 011011
5. Using the same code (A = 01, B = 10, C = 11), what does the thread 100111 spell?
A ABC
B BAC
B

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left columnRight column
1A = 00001 AThe patterns are in the wrong order. This thread spells CBA. For CAB the patterns must be C 00011, A 00001, then B 00010.
200011 00001 00010 BBAD = 00010 00001 00100
3Every letter has its own pattern, so two different letters never share one CA thread of 0s and 1s that reads back as the word CAB
4A short word can be written as a thread of 0s and 1s, with one pattern for each letter in order DA = 00001, B = 00010
5A = 00001, B = 00001 ETwo letters share the same pattern, so you cannot tell A from B. Every letter needs its own pattern, for example B = 00010.
6CAB = 00011 00010 00001 FThe letter A stored as a pattern of five 0s and 1s, like five beads on a thread
C

Definitions

binary code
D

Fill in the Blanks

Complete each line of code by filling in the missing parts.

1.
A = 00001, B = 00010, C = 00011 CAB = 00011 _____ 00010
2.
A = 00001, B = 00010, C = 00011 BAC = 00010 00001 _____
3.
A = 00001, B = 00010, C = 00011 00010 00001 00011 = B_C
4.
A = 00001, B = 00010, C = 00011 Each pattern has _ digits
5.
0 = red bead, 1 = blue bead A = 00001 = red red red red ____
E

Spot the Error

Shade in the letter of the line that contains an error.

Question 1
A A = 00001
B B = 00011
C C = 00011
Question 2
A word = "CAT"
B C = 00011
C A = 0001
D T = 10100
Question 3
A thread = 0100001001
B first 5 = 01000 is H
C next 5 = 01001 is H
D word = "HI"
Question 4
A 0 = red bead
B 1 = blue bead
C A = 00001 = blue x4, red
Question 5
A word = "ANT"
B thread = 00001 10100 01110
C letters = 3

Answer Key

A letter as a pattern of 0s and 1s
Section A: Quick Questions
Q1
A — As a pattern of 0s and 1s
Q2
A — Two bead colours: one for 0 and one for 1
Q3
B — Every letter has its own pattern
Q4
A — 110110
Q5
B — BAC
Section B: Match the Pairs
Q1
A = 00001 → The letter A stored as a pattern of five 0s and 1s, like five beads on a thread
Q2
00011 00001 00010 → A thread of 0s and 1s that reads back as the word CAB
Q3
Every letter has its own pattern, so two different letters never share one → A = 00001, B = 00010
Q4
A short word can be written as a thread of 0s and 1s, with one pattern for each letter in order → BAD = 00010 00001 00100
Q5
A = 00001, B = 00001 → Two letters share the same pattern, so you cannot tell A from B. Every letter needs its own pattern, for example B = 00010.
Q6
CAB = 00011 00010 00001 → The patterns are in the wrong order. This thread spells CBA. For CAB the patterns must be C 00011, A 00001, then B 00010.
Section C: Definitions
Q1
binary code — A pattern of 0s and 1s, like a thread of two bead colours. Every letter has its own pattern, so a computer can store text as 0s and 1s.
Section D: Fill in the Blanks
Q1
A = 00001, B = 00010, C = 00011 CAB = 00011 00001 00010
Q2
A = 00001, B = 00010, C = 00011 BAC = 00010 00001 00011
Q3
A = 00001, B = 00010, C = 00011 00010 00001 00011 = BAC
Q4
A = 00001, B = 00010, C = 00011 Each pattern has 5 digits
Q5
0 = red bead, 1 = blue bead A = 00001 = red red red red blue
Section E: Spot the Error
Q1
B — Every letter has its own pattern. B = 00011 is the same pattern as C. B should be 00010.
Q2
C — Every letter pattern is 5 digits long. A = 0001 only has 4. It should be 00001.
Q3
C — The pattern 01001 stands for I, not H. The line should read: next 5 = 01001 is I.
Q4
C — 0 is a red bead and 1 is a blue bead. 00001 is four red beads then one blue bead, so it should be red x4, blue.
Q5
B — The patterns must be in the same order as the letters. A-N-T is 00001 01110 10100. The broken thread would spell ATN.