Spot the odd one out

Exercise and reference answers

Questions

1. Items

   1. Radar
   2. Aircraft
   3. Microwave
   4. Ozone

   Odd item

   Ozone

2. Items

   1. Sound wave
   2. Infrared
   3. X-rays
   4. Gamma rays

   Odd item

   Sound wave

3. Items

   1. Maxwell
   2. Hertz
   3. Newton
   4. Ampere

   Odd item

   Newton

4. Items

   1. Hot bodies
   2. Heat waves
   3. Nuclear decay
   4. Infrared

   Odd item

   Nuclear decay

Instructions

Tap the item that does not belong with the others.

Explanation