1) WHAT ARE INSOLUBLE SUBSTANCES ? a) A SUBSTANCE THAT DISOVLES IN WATER . b) A SUBSTANCE THAT DOES NOT DISSOLVE IN A LIQUID.I 2) WHAT ARE MOLECULES ? a) IT IS THE SMALLEST PARTICLE OF A SUBSTANCE OR A CHMICAL ELEMENT. b) A DITCH . 3) GRIME IS A DIRT STUCK ON THE SURFACE OF SOMETHING. a) TRUE b) FALES 4) WHAT IS THE MEANING OF TRENCH ? a) A DITCH b) A SIEVE 5) WHEN SEAWATER EVAPORATES FROM A TRENCH , WHAT IS LEFT BEHIND a) SALT b) SAND c) SUGAR  d) NOTHING

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