NATURAL SCIENCE - solutions ( 18 - 22 May )

Page 93
2)  A.  Heterogeneous mixture.
     B.  Homogeneous mixture.
     C.  Heterogeneous mixture.

Page 95
4)   Two liquids with different densities ------> by decantation.
      Two liquids with different boiling points ------> distillation. 

Page 98
3)  Match...
     Water and alcohol -------> Distillation
     Two liquids of different densities  ------> Decantation
     Water and sand --------> Filtration
     Salt and water  --------> Evaporation
     Water and oil   --------> Decantation
     Two liquids with different boiling points ------> Distillation

Page 99
4) In your notebook...
    A solid into a liquid ---> melting
    A liquid into a gas -----> evaporation
    A gas into a liquid -----> condensation
    A liquid into a solid ---> solidification

6) Copy the table...
     

Pure substances	Homogeneous mixtures	Heterogeneous mixtures
Water	A vanilla milkshake	A bar of chocolate with hazelnuts in it
A silver necklace		Sand on the beach

9)   A.  Decantation

      B.  Distillation

      C.  Filtration

      D.  Evaporation