In this report I am going to describe an unknown substance and make an hypothesis about what it is.  
The teacher handed us a few grams of an unknown powder.

The substance looks from a distance to be white in colour, however, when looking closely one finds that they are actually many small crystals which are transparent to light.  From touch, I find that the crystals are hard and not easily broken.  They have no smell.  Finally when tasting this substance, I found it to be very “salty”.  

Based on these observations,  my hypothesis is that this substance is either salt or weijin (MSG).