ACARA Digital Technologies Years 9–10 Crossword: Data Compression and Acquiring and Validating Data (Modules 226–254)
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
- 2. Saves video space by storing only what changes between frames, reusing the still background from earlier frames and dropping fine detail viewers will not notice. Word 2 of: inter-_____ compression (5)
- 7. The part of a population you collect data from. It must represent the whole population, so use a big enough size, choose randomly and avoid sampling bias. (6)
- 8. A file type that stores data compressed: ZIP, PNG, FLAC are lossless; JPEG, MP3, MP4 are lossy. Each suits its content, such as photos, logos, music, video or documents. Word 3 of: Compressed ____ ______ (6)
- 9. Word 1 of the term in 4 Down: ____ > ______ (4)
- 10. Trying a survey on a few people first to find confusing questions, missing options and timing problems before the real data collection begins. Word 2 of: pilot ____ (4)
Down
- 1. Data engineers prepare data, data analysts explore it and share results, and data scientists build models and insights. Together they share the data science life cycle. Word 3 of: data science _____ (5)
- 3. Streaming that lowers the ______ of compressed audio and video on slow connections, trading quality for smooth playback with less buffering. Word 1 of: ________ _______ (8)
- 4. Audacity menu path that saves a recording as WAV or MP3 at a chosen quality, so you can compare ______ size and sound quality of the same audio. Word 2 of: ____ > ______ (6)
- 5. Word 2 of the term in 3 Down: ________ _______ (7)
- 6. A repeating cycle of five stages: define the objective, acquire data, clean it, analyse it, communicate insights. Findings can send you back to an earlier stage. Word 3 of: data science ____ cycle (4)
Answer Key
ACARA Digital Technologies Years 9–10 · Modules 226–254
1R
2F
R
3A
M
4E
O
5B
D
X
L
6L
I
7S
A
M
P
L
E
I
T
P
O
S
8F
O
R
M
A
T
R
E
A
I
T
T
V
9F
I
L
E
10T
E
S
T
Across
2FRAME — Saves video space by storing only what changes between frames, reusing the still background from earlier frames and dropping fine detail viewers will not notice. Word 2 of: inter-_____ compression
7SAMPLE — The part of a population you collect data from. It must represent the whole population, so use a big enough size, choose randomly and avoid sampling bias.
8FORMAT — A file type that stores data compressed: ZIP, PNG, FLAC are lossless; JPEG, MP3, MP4 are lossy. Each suits its content, such as photos, logos, music, video or documents. Word 3 of: Compressed ____ ______
9FILE — Word 1 of the term in 4 Down: ____ > ______
10TEST — Trying a survey on a few people first to find confusing questions, missing options and timing problems before the real data collection begins. Word 2 of: pilot ____
Down
1ROLES — Data engineers prepare data, data analysts explore it and share results, and data scientists build models and insights. Together they share the data science life cycle. Word 3 of: data science _____
3ADAPTIVE — Streaming that lowers the ______ of compressed audio and video on slow connections, trading quality for smooth playback with less buffering. Word 1 of: ________ _______
4EXPORT — Audacity menu path that saves a recording as WAV or MP3 at a chosen quality, so you can compare ______ size and sound quality of the same audio. Word 2 of: ____ > ______
5BITRATE — Word 2 of the term in 3 Down: ________ _______
6LIFE — A repeating cycle of five stages: define the objective, acquire data, clean it, analyse it, communicate insights. Findings can send you back to an earlier stage. Word 3 of: data science ____ cycle