Quizz Nanoparticles

What is the size range that defines nanoparticles?

• 1-100 micrometers

• 1-100 nanometers

• 1-100 millimeters

• 1-100 centimeters

The study of materials at the nanoscale is important because properties can change in:

• Predictable ways only

• Color and smell only

• Mechanical, electrical, optical, and chemical ways

• Size only

A nanometer is equal to:

• One millionth of a meter

• One thousandth of a meter

• One billionth of a meter

• One trillionth of a meter

Air filters using nanoparticles are effective because they can:

• Change air color

• Capture very small pollutant particles

• Heat the air

• Add fragrance to air

If a marble were scaled up to the size of Earth, a nanometer would be approximately:

• a) The size of a basketball

• The size of the original marble

• The size of a grain of sand

• The size of a building

What makes nanoparticles effective for catalysis (speeding up chemical reactions)?

• Their small size increases available surface area

• They are always hot

• They contain rare elements

• They glow in the dark

How thick is a human hair compared to a 100-nanometer nanoparticle?

•  About 80 times thicker
  

• About 800 times thicker

• About 8,000 times thicker

• About 80,000 times thicker

Nanoparticles in cosmetics are used primarily to:

• Change product smell
  

• Improve texture and coverage

• Make products more expensive

• Increase product weight

A red blood cell is approximately how many nanometers wide?

• 700 nanometers

• 7,000 nanometers

• 70,000 nanometers

• 700,000 nanometers

 Which field of medicine benefits from nanoparticle contrast agents?

• Dentistry only

• Medical imaging

• Surgery only

• Physical therapy