PDF chapter test TRY NOW

Fill up the blanks:
 
a. Salt is obtained from seawater by the process of 
.

b. Impurities settled at the bottom when muddy water was kept overnight in a bucket. The clear water was then poured off from the top. The process of separation used in this example is called
.
 
Answer variants:
decantation
filtration
evaporation
threshing