7 traditional building materials

1. Adobe
2. Cob
3. Rammed Earth
4. Limecrete
5. Mudbrick
6. Wattle and Daub
7. Bamboo

7 Squashes

1. Ambercup Squash
2. Butternut Squash
3. Kabocha Squash
4. Spaghetti Squash
5. Turban Squash
6. Petit Pan Squash
7. Courgette

7 answers we got right in this week's University Challenge

1. Gershwin
2. Sump
3. Nat King Cole
4. Arsenic
5. Wart
6. Ballistic Missile
7. 3rd

7 Jeff Minter games

1. Voidrunner
2. Trax
3. Headbanger's Heaven
4. Meta-Llamas
5. Hover Bovver
6. Blitzkrieg
7. Attack of the Mutant Camels

7 long running British TV series

1. Top Gear
2. Blue Peter
3. Dr Who
4. Match of the Day
5. Panorama
6. The Money Programme
7. The Sky at Night

7 windows keyboard shortcuts

1. Start-M - Minimize All
2. Start-Shift-M - Unminimize all
3. Start-R - Run
4. Start-E - Explorer
5. Start-F - Search
6. Start-Ctrl-F - Find Computer
7. Start-Break - System Properties

7 norse gods

1. Odin
2. Baldr
3. Tyr
4. Freyr
5. Loki
6. Vili
7. Tor