Muchemi

1(a) Statement about blood vessels Type of blood vessel both capillaries and veins capillaries only veins only neither capillaries nor veins Endothelial cells     Valves     (2) Question Number Answer Additional Guidance Mark 1(b) An explanation that makes reference to two of the following: • (blood) fluid is forced through capillary wall (1) • due to high hydrostatic pressure (in arterial end) (1) • due to narrowing of the arteries (1) ACCEP...

Question Number Answer Mark 1(a) AO1 (3 marks) Up to three marks for describing how an fMRI scan can be used to investigate the brain. For example: • An fMRI scan measures blood flow in the brain whilst a person is completing a task (1). When a particular area of the brain becomes more active when completing the task there is an increased demand for oxygen (1). The brain responds by increasing blood flow which allows researchers to produce images showing the levels of activity in ...

Question Number Answer Mark 1a AO1 (2 marks) Up to two marks for a description of the procedure of Milgram’s Ordinary man gives orders experiment 13 variation study. For example: • The participant and two confederates drew lots, the participant was always the teacher and the confederates were the learner and the accomplice (1). The confederate who was the accomplice said that it would be a good idea to increase the electric shocks one level each time the learner gave an incorrect ...

Question Number Answer Mark 1 The only correct answer is C A is not correct because this is an eighth of a wavelength apart B is not correct because this is a quarter of a wavelength apart D is not correct because this is one wavelength apart 1 2 The only correct answer is D A is not correct because this is the power of one converging lens B is not correct because this is the power of one diverging lens C is not correct because this is the power of two converging lenses 1 3 The only ...

Question Number Answer Mark 1 The only correct answer is A Energy as this is the only scalar quantity 1 B is not correct because moment is a vector quantity C is not correct because momentum is a vector quantity D is not correct because velocity is a vector quantity 2 The only correct answer is B P and Q have the same magnitude of momentum. 1 A is not correct because Q moves faster than P as it has a smaller mass and they have the same magnitude of momentum. C is not correct because Q mo...

Question Scheme Marks AOs 1(a) Complete method to find AB M1 3.1b 1 1 ( 5 5) (5 15) ( 5 10) 2 2 =   +  +   or 1 (30 15 5 ) 2 = +  or ( 5 5) 25 15 5 1 1 ( ) 2 2 =   + +  or 1 1 (20 15 5 ( 5 10) ) 2 2 = +  +   or 1 1 (30 5) ( 5 5) ( 5 10) 2 2 =  −   −   A1 1.1b =112.5 (m) A1 1.1b (3) (b) 112.5 0 5 20 30 B1 B1 B1 1.1b 1.1b 1.1b (3) (6 marks) Notes: (a) M1 Complete method to find the total area under the graph...

1 B1 2.2a B1ft 1.1b B1 2.2a B1ft 1.1b (4 marks) Notes 1st B1 for a box with 2 whiskers (one at each end) with median at 1.85 and lower quartile at 1.81 do not allow median = upper quartile [=1.85] 2nd B1ft for 1.92 plotted as the upper quartile (must be right hand end of box) or for plotting an IQR = 0.11, i.e. their upper quartile at “1.81” + 0.11 3rd B1 for lower whisker ending at 1.72 must be attached to whisker 4th B1ft for upper whisker ending 2.0 must be attached to whisker...

Question Scheme Marks AOs 1 3 2 2 2 ... x x x − → or 2 3 2 ...x x − − → M1 1.1b 3 2 2 2 2 3 x d 2 3 d x x x x x − − − = −   A1 1.1b 3 1 2 2 ... ... x x − − → or ... ... x x − − 2 1 → dM1 1.1b 3 1 2 3 d 4 3 x x x x x c − − 2 2 − = − + + − − 2 1 A1 1.1b (4) (4 marks) Notes M1: For separating the fraction into two separate terms. Award for one correct index (which does not need to be processed. e.g. 1 ...

Generic Level Descriptors Section A: Questions 1a/2a Target: AO2: Analyse and evaluate appropriate source material, primary and/or contemporary to the period, within its historical context. Level Mark Descriptor 0 No rewardable material 1 1–2 • Demonstrates surface level comprehension of the source material without analysis, selecting some material relevant to the question, but in the form of direct quotations or paraphrases. • Some relevant contextual knowledge is included, with ...

Generic Level Descriptors Section A: Questions 1a/2a Target: AO2: Analyse and evaluate appropriate source material, primary and/or contemporary to the period, within its historical context. Level Mark Descriptor 0 No rewardable material 1 1–2 • Demonstrates surface level comprehension of the source material without analysis, selecting some material relevant to the question, but in the form of direct quotations or paraphrases. • Some relevant contextual knowledge is included, with ...