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                        (c)     Giraffe                                (d)    Man













                   (e)     Tree                                  (f)  Juice




                                               Figure 2  Matter


                  Changes in states of matter


                  Activity 1  To investigate changes in states of matter

                  Materials Kettle, ice, fire and a metallic lid

                  Procedure
                  (i)   Put ice in  an open kettle. Then warm it on fire. Examine
                      it for about 5 minutes. What do you see?

                  (ii) Thereafter, cover the kettle and continue heating it until
                      the water boils. What do you see after opening the kettle?

                  (iii)  Place a metallic lid at the opening of the kettle. This
                      blocks the outcoming steam. What happens after you
                      obstruct the steam?



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                                     PROPERTY OF UNITED REPUBLIC OF TANZANIA GOVERNMENT
                                           Ministry of Education, Science and Technology
       Science  and Technology 3.indd   35                                                    03/08/2019   11:02
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