Ferrofluid and Magnetism Quiz

What is the primary reason ferrofluid forms spikes when exposed to a magnetic field?

• The temperature of the liquid decreases.

• The liquid evaporates quickly.

• The magnetic field lines align the metal particles.

• The liquid's viscosity increases.

Why do the metal particles in ferrofluid not sink to the bottom of the liquid?

• They are coated with a surfactant.

• They are repelled by the liquid.

• They are lighter than the liquid.

• They are too large to sink.

What role does the surfactant play in ferrofluid?

• It prevents the metal particles from clumping together.

• It increases the magnetic strength.

• It changes the color of the ferrofluid.

• It makes the ferrofluid more viscous.

What unusual behavior was observed when dry ice was combined with ferrofluid?

• The dry ice slid back up the ferrofluid mound.

• The dry ice melted instantly.

• The ferrofluid changed color.

• The ferrofluid evaporated.

What was the result of mixing watercolors with ferrofluid?

• The ferrofluid formed colorful patterns.

• The ferrofluid became solid.

• The ferrofluid evaporated.

• The ferrofluid lost its magnetic properties.