7 welding processes

1. Friction Welding
2. Butt Welding
3. Projection Welding
4. Electroslag Welding
5. Stud Arc Welding
6. Atomic Hydrogen Welding
7. Upset Welding

7 notes on my phone

1. 1172136
2. Tissue Paper Batteries
3. DK/Worsted 3.5mm
4. biBHmTEwS2
5. 300ml cream, 300g choc, Sea salt, Knob
6. D2460 21 22
7. Recoil, Tiefschwarz, Danton Eeprom

7 Houdini Escapes

1. Mirror Handcuff Challenge
2. Milk Can Escape
3. Rope Escape
4. Chinese Water Torture Cell
5. Suspended Straitjacket Escape
6. Overboard Box Escape
7. Buried Alive Stunt

7 initial tracks playing on shuffle on the Zeppelin

1. Lionel Richie - To the Rhythm
2. Fila Brizillia - Slow Light
3. CT Lab - Bonnie & Clyde
4. India Arie - Part of my life
5. Bee Gees - Love you Inside Out
6. dZihan & Kamien - Spacewater
7. Days of the New - Where are you

7 birds endemic to Australia

1. Buff-breasted Buttonquail
2. Tooth-billed Catbird
3. Eastern Bristlebird
4. Forty-spotted Pardalote
5. Yellow-rumped Munia
6. Red-winged Fairy-wren
7. Paradise Riflebird

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

1. Energy
2. David
3. Bats
4. Chickpea
5. Queens
6. Raphael
7. 20

7 hardy bamboos