WONDER #675: How Does Scratch and Sniff Work?

Question 1 of 3

This Wonder was mostly about...

1. how to make your own scratch and sniff stickers.
2. how scratch and sniff technology works and examples of its uses.
3. which scratch and sniff scents are most popular.
4. why scratch and sniff stickers aren’t made anymore.

Question 2 of 3

Scratch and sniff technology involves treating an object with a __________________ coating.

1. banana
2. macromolocule
3. microfragrance
4. sticky

Question 3 of 3

Which is NOT a common use of scratch and sniff technology, according to this Wonder?

1. Scented furniture
2. Perfume advertisements
3. Teaching people what gas leaks smell like
4. Testing for Alzheimer’s disease

Check your answers online at https://wonderopolis.org/wonder/How-Does-Scratch-and-Sniff-Work.