Material downloaded from http://myCBSEguide.com and http://onlineteachers.co.in Portal for CBSE Notes, est Papers, Sample Papers, ips and ric!s Summative Assessment-1 2014-2015 Science Class IX Time allowed: 3:00 hoursMaximum Marks: 90 General Instructions: a)ThequestionpapercomprisesoftwosectionsAandB!ouaretoattempt"oththe sections ")All questions are compulsor# c)All questions of Section $ A and Section $ B are to "e attempted separatel# d)% &o ' to 3 in Section A $ ' marks questions These are to "e answered in a"out one word or in one sentence e)% &o ( and ) in Section A $ * marks questions These are to "e answered in a"out 30 words each f)% &o + to '+ in Section A $ 3 marks questions These are to "e answered in a"out )0 words each ,)% &o '- to *' in Section A $ ) marks questions These are to "e answered in a"out -0 words each h)Section B has 3 .TBA questions %uestion num"er ** is two marks/ %uestion num"er *3 is three marks and %uestion num"er *( is fi0e marks question i)%uestion num"ers *) to 33 in Section $ 1 are multiple choice questions "ased on practical skills 2ach question is a one mark question !ou are to select one most appropriate response out of the four pro0ided to #ou3)%uestion num"er 3( to 3+ in Section $ 1 are two marks questions "ased on practical skills These are to "e answered in a"out 30 words each Section A '4hich the unit is used to measure the atomic radius5 1on0ert this unit in metre *6ind the num"er of electrons/ protons and neutrons possessed "# the alpha particles ( )42He++used in the ,old leaf experiment 37elate the ,i0en plant with its di0ision in the scheme of classification (8f a rin,in, "ic#cle "ell is held ti,htl# "# hand/ wh# does it stop producin, sound5 4hat does it pro0e5 )An o"3ect of mass m when raised to a hei,ht h possesses potential ener,# of *00 9 find the new potential ener,# if the same o"3ect is raised to a hei,ht 3 h Material downloaded from http://myCBSEguide.com and http://onlineteachers.co.in Portal for CBSE Notes, est Papers, Sample Papers, ips and ric!s +4rite two points of difference "etween an atom and an ion 2xplain "# ,i0in, examples of two t#pes of ions present in the compound composed of metals and non:metals -;raw Bohr ' ")&um"er of or"its > 3 c)Mass num"er > *3 Also identif# the element 4hat conclusion can "e drawn a"out the reacti0it# of the element5 ?a)4hen '0 , of sulphur is "urnt in '0 , of ox#,en *0 , of sulphur dioxide is produced5 6ind the mass of sulphur dioxide formed on "urnin, *0 , of sulphur in 30 , of ox#,en5 9ustif# #our answer "# statin, the law which ,o0erns #our answer ")Stae the postulate of ;alton