Q1- a) cornea and retina, b) Pupil/iris, ciliary muscle changes shape of lens, lens changes shape to focus light from various distances. 5 marks,
Q2- a) conclusion thing b)1 marker, can't remember, c)work out lens power. 5 marks
Q3- a) 6 mark x-rays b) why x-rays are unsafe on fetus c) use of ultrasound (kidney stones) . 9 marks
q4- a) hydraulic pressure in liquid, work out pressure, is force bigger. 5 marks
Q5) a) space question- where the astronaut travels and the force, 3 conclusions, graph quesion, how motor works in thing, how it moves (arrows), is space exploration worth it, something else. 12 marks
Q6- why boat is stable (2), why suitcase is stable (2), pendulum maths(3). 7 marks
Q7 a) ray diagram (4), describe camera image (2) 6 marks
Q
Q8) a) how transformer works (3), voltage is 20, amps is 0.3, advantage of switch mode, advantage of battery,. 9 marks
Adds up to 58.