U.S. Currency Security Features

The video tutorial explains the prevalence and impact of counterfeit money, highlighting the use of simple tools and chemistry to detect fake bills. It covers the use of anti-counterfeit detection pens that identify starch in counterfeit paper and the role of UV light in revealing security strips in authentic bills. Additionally, it provides visual cues to spot counterfeit bills, such as lifelike portraits and even spacing in serial numbers.

What is the estimated ratio of counterfeit bills in the U.S.?

• 1 in 1,000,000

• 1 in 100,000

• 1 in 10,000

• 1 in 1,000

What does the anti-counterfeit detection pen contain?

• Potassium iodide and elemental bromine

• Potassium chloride and elemental iodine

• Potassium iodide and elemental iodine

• Sodium iodide and elemental iodine

What material are authentic U.S. bills made from?

• Cotton and polyester

• Linen and polyester

• Cotton and silk

• Cotton and linen

Which company is responsible for producing the material for U.S. currency?

• Crane and Company

• Smith and Wesson

• Johnson and Johnson

• Revere and Sons

What feature in U.S. bills fluoresces under UV light?

• A metallic thread

• A holographic strip

• A polyester strip with invisible ink

• A watermark

What happens to molecules in the UV strip when they absorb energy?

• They become magnetic

• They change color

• They emit sound

• They emit light

What is the relationship between energy and wavelength?

• Directly proportional

• Inversely proportional

• Unrelated

• Exponentially proportional

What is the main purpose of the UV strip in U.S. bills?

• To make the bill heavier

• To prevent counterfeiting

• To increase durability

• To add color

Which visual cue is NOT a sign of a counterfeit bill?

• Lifelike portrait

• Uneven sawtooth points on the seal

• Unbroken inked border

• Precisely spaced serial numbers

What should you do if you suspect a bill is counterfeit?

• Report it to the police

• Spend it quickly

• Use an iodine solution or UV light

• Ignore it