Invisible Ink and Science

The video celebrates National Coloring Day with a fun project: making invisible ink using baking soda and grape juice. The process involves mixing baking soda with water to create ink, writing a secret message, and revealing it with grape juice. The science behind this involves a chemical reaction where grape juice acts as an indicator, changing color when it contacts the base, baking soda. The video concludes by highlighting the experiment's simplicity and its connection to real scientific practices.

What special day are Squeaks and the narrator preparing for?

• National Art Day

• National Baking Day

• National Coloring Day

• National Science Day

Which of the following is NOT needed to make the invisible ink?

• Water

• Vinegar

• Purple grape juice

• Baking soda

What is the purpose of the grape juice in the invisible ink experiment?

• To dry the ink faster

• To clean the paper

• To make the paper colorful

• To reveal the secret message

What type of chemical is baking soda classified as?

• Metal

• Salt

• Base

• Acid

What happens to the grape juice when it touches the baking soda on the paper?

• It turns into a gas

• It becomes darker

• It becomes lighter

• It evaporates

What is the name of the chemical in grape juice that acts as an indicator?

• Anthocyanin

• Tannin

• Chlorophyll

• Carotene

Why do scientists use indicators in their experiments?

• To decrease the acidity

• To increase the temperature

• To test if a chemical is a base

• To make solutions colorful

What color does anthocyanin turn when it reacts with a base?

• Yellow

• Darker purple

• Green

• Red

What is the main scientific concept demonstrated in the invisible ink experiment?

• Photosynthesis

• Magnetism

• Chemical reaction

• Evaporation

What should you have on hand to write secret messages using this method?

• Orange juice

• Apple juice

• Grape juice

• Lemon juice