P2(2) Flashcards
1
Q
What are the stages of sewage treatment?
A
- Screening and grit movement
- Sedimentation
- Anaerobic digestion of sewage sludge
- Aerobic biological treatment
2
Q
Define independent variable
A
Something you can change
3
Q
Define control variable
A
Something you can’t change (same)
4
Q
Define dependant variable
A
Thing you measure