fact and question: when light enters the eye through the pupil , that light falls on the retina
Question: Which is likeliest to make light pass through the pupil?

What's the answer?

answer: any kind of tangible object


fact and question: echolocation is when some animals detect objects by hearing echoes by emitting sound
Question: Some animals that detect objects by emitting sound live in

What's the answer?

answer: rivers


fact and question: a sifter is used for separating mixtures
Question: Which of these could be separated with a sifter

What's the answer?

answer: a bowl of cereal


fact and question: evaporation is a stage in the water cycle process
Question: The only stage of the water cycle process that is nonexistent is

What's the answer?

answer:
evaluation