TED-Ed: This weird trick will help you summon an army of worms | Kenny Coogan

The video explores the practice of worm grunting, a tradition where vibrations cause earthworms to surface. Various hypotheses have been proposed to explain this behavior, including the idea that worms are charmed by noise or mimic rain to avoid drowning. However, experiments by Kenneth Catania suggest that worms surface to escape moles, a natural predator. This behavior persists because it is beneficial against frequent predators, despite making worms vulnerable to humans and other animals. The video highlights the historical and scientific exploration of this phenomenon.

What is one of the initial hypotheses about why worms surface during worm grunting?

• They are trying to escape heat.

• They are attracted to light.

• They are seeking food.

• They are charmed by the noise.

Which hypothesis did Kenneth Catania's experiments disprove regarding worm grunting?

• Worms are trying to escape heat.

• Worms surface to avoid drowning from rain.

• Worms are charmed by the noise.

• Worms are seeking food.

What did Kenneth Catania discover about the vibrations produced by worm grunters?

• They mimic the sound of rain.

• They attract worms by mimicking bird calls.

• They overlap with the frequencies of moles digging.

• They are too weak to affect worms.

Why do scientists believe worms continue to surface despite human exploitation?

• They are confused by human noise.

• It is beneficial against more frequent predators.

• They are attracted to human activity.

• They are trying to find new habitats.

What record did a 10-year-old British girl set in 2009 related to worm charming?

• Most worms charmed in 30 minutes.

• Most diverse species charmed.

• Loudest worm grunting noise.

• Longest worm charming session.