Binary means two states
Name:
Date:
Class:
A
Quick Questions
Shade in the A or B circle for each question.
1. Which two digits does binary use?
2. Binary means using how many different states or values?
3. A light switch is a good example of binary because it can be...
4. The counting numbers we use every day use how many digits (0 to 9)?
5. Which one is a binary number?
B
Match the Pairs
Draw a line connecting each item on the left to its match on the right.
| Left column | Right column | |
|---|---|---|
| 1binary | AThat is the ten digits we count with. Binary only uses two digits, 0 and 1. | |
| 20 and 1 | Bon = 1, off = 0 | |
| 3A light switch has two states, so it is like a binary digit | CBinary only has two states. A switch is either on (1) or off (0). There is no 2. | |
| 4The ten digits we count with are different from binary, which only has two | DThe two digits a computer uses to store data | |
| 5Binary uses the digits 0 to 9 | EUsing only two values or states, like 0 and 1 or on and off | |
| 6A switch in binary can be 0, 1 or 2 | F0 1 2 3 4 5 6 7 8 9 vs 0 1 |
C
Definitions
binary
D
Fill in the Blanks
Complete each line of code by filling in the missing parts.
1.
off = 0
on = _
2.
binaryStates = _ # 0 and 1
3.
decimal = 0 1 2 3 4 5 6 7 8 _
4.
bit = 0
switch = "___"
5.
Computers store data using ______
E
Spot the Error
Shade in the letter of the line that contains an error.
Question 1
A
light = 'on'
B
if light == 'on':
C
bit = 1
D
else
E
bit = 0
Question 2
A
digits = [0, 1]
B
print(len(digit))
C
print('two states')
Question 3
A
bits = [0, 1]
B
for b in bits:
C
print('bit is' b)
Question 4
A
state = 'off'
B
if state == 'off':
C
bit = 2
Question 5
A
dec = 10
B
bin = 2
C
if bin > dec:
D
print('fewer digits')
Answer Key
Binary means two states
Section A: Quick Questions
Q1
A — 0 and 1
Q2
A — Two
Q3
A — Only on or off
Q4
B — Ten digits
Q5
B — 1001
Section B: Match the Pairs
Q1
binary → Using only two values or states, like 0 and 1 or on and off
Q2
0 and 1 → The two digits a computer uses to store data
Q3
A light switch has two states, so it is like a binary digit → on = 1, off = 0
Q4
The ten digits we count with are different from binary, which only has two → 0 1 2 3 4 5 6 7 8 9 vs 0 1
Q5
Binary uses the digits 0 to 9 → That is the ten digits we count with. Binary only uses two digits, 0 and 1.
Q6
A switch in binary can be 0, 1 or 2 → Binary only has two states. A switch is either on (1) or off (0). There is no 2.
Section C: Definitions
Q1
binary — Using only two values, like 0 and 1 or on and off. Computers store all data using just these two states.Section D: Fill in the Blanks
Q1
off = 0
on = 1Q2
binaryStates = 2 # 0 and 1Q3
decimal = 0 1 2 3 4 5 6 7 8 9Q4
bit = 0
switch = "off"Q5
Computers store data using binarySection E: Spot the Error
Q1
D — The else line needs a colon at the end. It should be: else:
Q2
B — The list is called digits, not digit. The line should be print(len(digits)), which prints 2 because binary has two digits.
Q3
C — A comma is missing between 'bit is' and b. It should be print('bit is', b).
Q4
C — Binary only uses 0 and 1. Off is stored as 0, so the line should be bit = 0.
Q5
C — Binary has 2 digits and the counting system we use has 10, so binary has fewer. The test should be bin < dec.