Which compound is the main acid in lemons and limes?
Answer
Citric acid
The well runs deep
Trivia questions and answers, drawn fresh from the well
239,757 public questions across 1,818 topics. Challenge yourself, or build the perfect quiz for game night.
239,757
Questions with answers
1,818
Topics to explore
3
Depths of difficulty
Today at the well
1 / 5 0
Which marine worm is famous for ambushing prey with powerful, extendable jaws?
Answer
Bobbit worm
In sea turtles, what environmental factor commonly determines hatchling sex?
Answer
Incubation temperature
What process lets dolphins locate objects using reflected clicks?
Answer
Echolocation
0 / 5
Round complete
239,757 trivia questions
Every question has an answer
1,818 public topics
Something for every quiz
Free to explore
Reveal answers at your own pace
Fresh from the well
Latest trivia questions
In sea turtles, what environmental factor commonly determines hatchling sex?
Answer
Incubation temperature
What process lets dolphins locate objects using reflected clicks?
Answer
Echolocation
What ecological role does the sea otter famously play in kelp forests?
Answer
Keystone predator
Which sea turtle is the fastest swimmer?
Answer
Leatherback sea turtle
Which whale is the largest toothed whale?
Answer
Sperm whale
Which ocean habitat is formed by dense underwater forests of kelp?
Answer
Kelp forest
What is the name of the light-producing organ in many deep-sea animals?
Answer
Photophore
Which marine reptile is known for migrating between feeding and nesting grounds across the Pacific?
Answer
Leatherback sea turtle