By the end of the lesson the learner should be able to:-Define chemistry.-Explain the meaning and different phases/states of matter. Chemistry is defined as the branch of science that deals with the structure composition, properties and behavior of matter.Matter -Matter is anything that has weight/mass and occupies space.States/phases of matter-Naturally, there are basically three states of matter. (i) Solid-e.g. soil, sand, copper metal, bucket, ice. (ii)Liquid-e.g water, Petrol, ethanol/alcohol, Mercury (liquid metal).(iii) Gas- e.g. Oxygen, Nitrogen, Water vapor........
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