technical terms and shows some clarity and organisation spelling, punctuation • and the rules of grammar are used with some accuracy 3 5 - 6 a detailed explanation or a fully • labelled diagram of the situation and explanation of how the charge would build up in the unprotected situation clearly linked to a relevant safety precaution and explanation of how this results in a controlled discharge or prevents the charge separation in the first place the student uses a range of • technical terms and shows good clarity and organisation spelling, punctuation • and the rules of grammar are used with considerable accuracy Q6. Answer Acceptable answers Mark (a) (i) A gained electrons (1) (a)(ii) An explanation linking any two of Reject positive electrons and the following Friction movement of positive charge (1) (Causes) hair to lose Rubbing (hair with comb) electrons(to the comb) Electrons transfer/move (Ignore (2) (1) Hair has an (overall) positive atoms) charge (1) Eg electrons transfer to hair as comb rubs hair gains 2 marks (a) An indication that negative An arrow/label clearly indicating (1) (iii) charges have been repelled ( by to the bottom of the foil Correct the comb) (1) separation of positive and negative charges minus signs shown less than half-way up the foil (b) An explanation linking the No credit for both have the following points excess charge same charge so is removed /comb does not Accept electrons for charge become charged /gain Charge is earthed/flows (in)to charge/static electricity (1) ground/off comb/into Vicky (2) it/charge moves through the Metal is a conductor credit they metal/comb (1) are both neutral/have no charge with 1 mark Indicative Content Mark *(c) A description / comparison/ explanation / etc including (6) some of the following points
technical terms and shows some clarity and organisation • spelling, punctuation and the rules of grammar are used with some accuracy 3 5 - 6 • a detailed explanation or a fully labelled diagram of the situation and explanation of how the charge would build up in the unprotected situation clearly linked to a relevant safety precaution and explanation of how this results in a controlled discharge or prevents the charge separation in the first place • the student uses a range of technical terms and shows good clarity and organisation • spelling, punctuation and the rules of grammar are used with considerable accuracy Q6. Answer Acceptable answers Mark (a) (i) A gained electrons (1) (a)(ii) An explanation linking any two of the following Friction (1) (Causes) hair to lose electrons(to the comb) (1) Hair has an (overall) positive charge (1) Reject positive electrons and movement of positive charge Rubbing (hair with comb) Electrons transfer/move (Ignore atoms) Eg electrons transfer to hair as comb rubs hair gains 2 marks (2) (a) (iii) An indication that negative charges have been repelled ( by the comb) (1) An arrow/label clearly indicating to the bottom of the foil Correct separation of positive and negative charges minus signs shown less than half-way up the foil (1) (b) An explanation linking the following points excess charge is removed /comb does not become charged /gain charge/static electricity (1) it/charge moves through the metal/comb (1) No credit for both have the same charge so Accept electrons for charge Charge is earthed/flows (in)to ground/off comb/into Vicky Metal is a conductor credit they are both neutral/have no charge with 1 mark (2) Indicative Content Mark *(c) A description / comparison/ explanation / etc including some of the following points (6)
p2_revision_pack_mark_scheme.docx