WONDER #2622: How Does a Key Card Unlock a Door?

Question 1 of 3

Which of these is NOT a common type of key card?

  1. Magstripe
  2. Radio frequency identification (RFID)
  3. Light wave communication
  4. Near Field Communication (NFC)

Question 2 of 3

What is the difference between RFID and NFC cards?

  1. RFID cards are much larger than NFC cards.
  2. NFC cards can be programmed for two-way communication, while RFID cards are only one-way.
  3. NFC cards work the same way as those with a magstripe, while RFID cards are completely different.
  4. There is no difference between RFID and NFC cards.

Question 3 of 3

This Wonder was mostly about...

  1. why key cards are better than metal keys.
  2. how to program your smartphone to be used like a key card.
  3. how fast technology is changing.
  4. three types of key cards and how each one works.

Check your answers online at https://www.wonderopolis.org/wonder/How-Does-a-Key-Card-Unlock-a-Door.