Test yourself under real exam conditions: 50 timed questions, 60 on the clock, pass mark 70%%. Instant score with a full review of everything you got wrong. Free — no account needed.
Exam details
An enclosed tank containing aquatic life and plants.
The hobby of maintaining aquariums.
Freshwater has no salinity; saltwater requires sea salt and is more complex.
Water with low salinity, between fresh and salt.
Freshwater community, planted, biotope, species-only, saltwater fish-only, reef.