Years 7–8 Data & Information Crossword: Representing data with binary and Acquiring, storing and validating data (Modules 9–45)
Name:
Date:
Class:
✎
Crossword
Read each clue and write the matching term in the grid. Numbers in brackets show the letters in each word.
1
2
3
4
5
6
7
8
9
10
Across
- 3. The size of an uncompressed bitmap image in ______. Multiply width by height by the ______ used for each pixel, then divide by 8 to get bytes. Word 5 of: width x height x ____ per pixel (4)
- 5. Word 3 of the term in 1 Down: subtract _____ ______ (6)
- 7. A field whose value is different for every record, such as a student ID or an AutoNumber, so each record can be identified. Names make a poor ______ because two people can share one. Word 1 of: _______ ___ (7)
- 9. The number of pixels in an image, given as width x height (like 1920 x 1080). More pixels give more detail but make a bigger file. (10)
- 10. Word 2 of the term in 7 Across: _______ ___ (3)
Down
- 1. To write a number in 8-bit binary, go from 128 down to 1. If the ______ value fits in what is left, write 1 and subtract it. If not, write 0. Check by adding the ______ ______. Word 2 of: subtract _____ ______ (5)
- 2. A byte has 8 bits with place values 128 down to 1. Add the place values that are 1s. The smallest number is 0 and the largest is 11111111 = 255, so a byte stores 0 to 255. Word 3 of: 8-bit ______: 128 64 32 16 8 4 2 1 (6)
- 4. The number of sound measurements taken each second, in hertz (Hz). CDs use 44,100 Hz. A higher ______ gives better quality but makes a bigger file. Word 1 of: ______ ____ (6)
- 6. A system that gives every character a unique number, including letters from many languages and emoji, so it covers far more than the small ASCII table. (7)
- 8. Word 2 of the term in 4 Down: ______ ____ (4)
Answer Key
Years 7–8 Data & Information · Modules 9–45
1P
L
2B
A
3B
I
T
S
4S
C
N
5V
A
L
6U
E
S
A
M
N
R
7P
R
I
M
A
8R
Y
L
C
A
9R
E
S
O
L
U
T
I
O
N
D
E
10K
E
Y
Across
3BITS — The size of an uncompressed bitmap image in ______. Multiply width by height by the ______ used for each pixel, then divide by 8 to get bytes. Word 5 of: width x height x ____ per pixel
5VALUES — Word 3 of the term in 1 Down: subtract _____ ______
7PRIMARY — A field whose value is different for every record, such as a student ID or an AutoNumber, so each record can be identified. Names make a poor ______ because two people can share one. Word 1 of: _______ ___
9RESOLUTION — The number of pixels in an image, given as width x height (like 1920 x 1080). More pixels give more detail but make a bigger file.
10KEY — Word 2 of the term in 7 Across: _______ ___
Down
1PLACE — To write a number in 8-bit binary, go from 128 down to 1. If the ______ value fits in what is left, write 1 and subtract it. If not, write 0. Check by adding the ______ ______. Word 2 of: subtract _____ ______
2BINARY — A byte has 8 bits with place values 128 down to 1. Add the place values that are 1s. The smallest number is 0 and the largest is 11111111 = 255, so a byte stores 0 to 255. Word 3 of: 8-bit ______: 128 64 32 16 8 4 2 1
4SAMPLE — The number of sound measurements taken each second, in hertz (Hz). CDs use 44,100 Hz. A higher ______ gives better quality but makes a bigger file. Word 1 of: ______ ____
6UNICODE — A system that gives every character a unique number, including letters from many languages and emoji, so it covers far more than the small ASCII table.
8RATE — Word 2 of the term in 4 Down: ______ ____