- How many senses do you have?
- Which of the following are magnetic: a tomato, you, paperclips?
- What are the primary colours of pigments and paints?
- What region of the tongue is responsible for sensing bitter tastes?
- What are the states of matter?
If you answered five; paperclips; red, yellow and blue; the back of the tongue; and gas, liquid and solid, then you would have got full marks in any school exam. But you would have been wrong. At Real Clear Science