Help the mad scientist finalize his evil laboratory report.

"The new potion will ___ the town's water supply, creating a disastrous ___ on everyone's hair color."

The correct answer is affect / effect.

Affect is almost always a verb meaning "to influence or change" (The potion will affect the water).

Effect is almost always a noun meaning "the result of a change" (creating a disastrous effect).

Helpful trick: Think of the acronym RAVEN: Remember Affect Verb, Effect Noun.