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Enter the site and go to the Storage section. Then click on the
DVD button. Read the text and find:
- the compression format used by a DVD disk
- two similarities between CDs and DVDs
- two differences between CDs and DVDs
- the storage capacity of a basic DVD disk
- the storage capacity of a double-sided, dual layer DVD.
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Summarise the technical specifications and uses of these DVD formats:
- DVD-ROM:
- DVD-Video:
- DVD-Audio:
- DVD-Recordable:
- DVD-Rewritable:
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Match the terms on the left with the correct meaning on the right.
1 compression
2 laser beam
3 tracks
4 micron
5 rewritable
6 layer
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a erasable
b unit of length equal to one millionth of a metre
c concentric circles
d stratum, horizontal division
e making data occupy less space
f intense ray of electrical power
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