Erasing with heat

The video tutorial introduces a Pilot Frixion erasable pen that uses thermochromic ink, which changes color with temperature. The pen's ink can be erased by friction, which generates heat, and can be made to reappear by cooling the ink with a spray can. The tutorial demonstrates how the ink's color can be repeatedly changed by applying heat and cold, making it a useful tool for demonstrating scientific principles related to temperature and color change.

What is the unique feature of the Pilot Frixion pen's ink?

• It is waterproof.

• It is scented.

• It changes color with temperature.

• It glows in the dark.

How does the eraser end of the Pilot Frixion pen work?

• It uses a chemical reaction to remove ink.

• It physically scrapes off the ink.

• It generates heat through friction to change the ink's color.

• It uses a magnet to erase the ink.

What is the purpose of using a spray can in the demonstration?

• To add a protective layer over the ink.

• To cool the paper and restore the ink's color.

• To permanently remove the ink.

• To change the ink's color to a new one.

What is a potential risk when using the spray can in the demonstration?

• It can cause the ink to become permanent.

• It can freeze your skin if it comes into contact.

• It can make the ink glow.

• It can cause the paper to catch fire.

What happens to the ink when the temperature is altered repeatedly?

• The ink becomes waterproof.

• The ink becomes invisible permanently.

• The ink changes color but remains present.

• The ink loses its erasable property.