Question

Separate these substances into elements, compounds and mixtures: air, copper, sea water, nitrogen, soil, mercury, lemon squash, sugar and vitamin C

Answer 1

Elements: Nitrogen, mercury and copper
Compounds: Sugar and vitamin C
Mixtures: Air (mixture of gases), soil (mixture of liquids, minerals, organic matter, etc.), lemon squash (mixture of lemon juice, sugar and water) and sea water (mixture of water and salts)