Years 7–8 Data & Information Word Scramble: Representing data with binary and Acquiring, storing and validating data (Modules 9–45)
Name:
Date:
Class:
🔤
Word scramble
Unscramble the letters and write each key term on the line.
1
TRCSATBU ELPAC AUVSLE
To write a number in 8-bit binary, go from 128 down to 1. If the place value fits in what is left, write 1 and subtract it. If not, write 0. Check by adding the place values.
2
CIISA
A standard table that gives every character a number, such as A = 65 and a = 97, so computers can store text as binary. Lowercase codes are 32 more than capitals.
3
EUCOIND
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.
4
TIEROLNSUO
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.
5
PALSEM TERA
The number of sound measurements taken each second, in hertz (Hz). CDs use 44,100 Hz. A higher rate gives better quality but makes a bigger file.
6
IYMRRPA EKY
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 key because two people can share one.
Answer Key
Years 7–8 Data & Information · Modules 9–45
1TRCSATBU ELPAC AUVSLE → subtract place values — To write a number in 8-bit binary, go from 128 down to 1. If the place value fits in what is left, write 1 and subtract it. If not, write 0. Check by adding the place values.
2CIISA → ASCII — A standard table that gives every character a number, such as A = 65 and a = 97, so computers can store text as binary. Lowercase codes are 32 more than capitals.
3EUCOIND → Unicode — 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.
4TIEROLNSUO → resolution — 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.
5PALSEM TERA → sample rate — The number of sound measurements taken each second, in hertz (Hz). CDs use 44,100 Hz. A higher rate gives better quality but makes a bigger file.
6IYMRRPA EKY → primary key — 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 key because two people can share one.