Table 1: Observation of Substance A, B, C, D and E in water

Table 1: Observation of Substance A, B, C, D and E in water

Substance	Physical Appearance	Changes observed at 0min	Changes observed after 10min	Inference/ Evidence of life
A	Grainy, sandy, brownish	·     Some substance sank to the bottom of the test tube and some dissolved. ·     Water turned murky.	·     Some substance sank to the bottom of the test tube and some dissolved. ·     Water turned murky.	No evidence of life.
B	Beige-coloured, cylinder-shaped	·    Substance dissolved in the water. ·    Water turned milky.	·    Substance dissolved in the water. ·    Water turned milky.	No evidence of life.
C	Transparent, round	·    Substance sank to the bottom of the test tube. ·    Water remained transparent.	·     Substance expanded in size. ·     Water remained transparent.	Living things grow.
D	Brown, round	·    Substance sank to the bottom of the test tube. ·    Water remained transparent.	·    Substance sprouted some yellow ·    Water remained transparent.	Living things grow.
E	Brown, powdery, sandy	·    Some substance sank, some in midair and some floated on the surface, creating a ring. ·    Water remained transparent.	·    Some substance sank, some in midair and some floated on the surface, creating a ring. ·    Water remained transparent.	No evidence of life.

 Substance D and E at 0min

                                 

  Substances A, B, C, D and E at 0min (left to right)

           

  Substances A, B, C and D at 0min (left to right)

             

Substance A at 0min

                             

Substances A,  B and C at 0min (left to right)

               

Substances A, B, C, D and E after 10min (left to right)

                                                             

 Substances A, B and C after 10min (left to right)

           

 Substances D and E after 10min (left to right)