Answer Key Section B Scheme Year 6

Marking Scheme ( Suggested Answer ) For Year 6 Excel II 1. a) To investigate the relationship between the presence of air and the condition of fish. b) i. The presence of air ii. The volume of water // The number of fish // The duration of experiment ( Any acceptable answer ) c) The fish P will die but fish Q still alive. d) Fish P lack of air. 2. a) The distance covered by the wooden block on an oily surface is further than the distance covered by the wooden block on the dry surface. b) Less friction on the oily surface c) i. Size of the wooden block // Weight of the wooden block // ( Any acceptable answer ) d) The smoother the surface, the further the distance covered by the wooden block.

3. a) To investigate the relationship between the size of substances and the volume of water absorbed. b) The volume of water absorbed. c) The size of the substance W increase, the volume of water absorbed also increase. d) Substance Z cannot absorb water. e) Plastic // glass // metal //( Any acceptable answer )

4. a) More boxes can be lifted by using a machine. b) Save energy c) work more easy // save time d) number of boxes that can be lifted , presence of machine