Today · September 19, 2026
Can you get 5/5?
Answer once, then open the explanation. Your streak is stored only in this browser.
Question 1 of 5
What best explains the ‘doorway effect’?
Why: Crossing a meaningful boundary can prompt event-model updating, making information tied to the previous context temporarily harder to retrieve.
Read the source-backed explanation →Question 2 of 5
Why do many materials look darker when wet?
Why: Water fills microscopic air gaps and changes refraction, often reducing diffuse scattering and giving light more chances to enter and be absorbed.
Read the source-backed explanation →Question 3 of 5
Why can an apple float in water?
Why: Apple tissue contains substantial air-filled space, lowering the fruit’s average density enough for buoyancy to support it.
Read the source-backed explanation →Question 4 of 5
What usually triggers an earthquake on a fault?
Why: Tectonic motion loads faults with stress. When friction can no longer hold the rocks, sudden slip releases seismic waves.
Read the source-backed explanation →Question 5 of 5
What is the photic sneeze reflex?
Why: For susceptible people, sudden bright light can trigger sneezing. The trait is partly genetic, though the exact neural mechanism is still debated.
Read the source-backed explanation →Finished
Today’s 5 complete
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Every question comes from a checked FactToon answer
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