Daily Practice · GCSE Science
July 2011 - GCSE Science 5-a-day
Every GCSE Science sheet published in July 2011, with answers. Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
Every sheet in July 2011
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st July 2011A reaction profile shows the reactants at 150 kJ and the peak (activation energy point) at 195 kJ. Calculate the activation energy.
- 2nd July 2011State the two named reactants used in the Haber process.
- 3rd July 2011A solution gives a cream precipitate when acidified with dilute nitric acid and then treated with silver nitrate solution. Name the halide ion present.
- 4th July 2011A device transfers 4500 J in 90 s. Calculate its power.
- 5th July 2011A component has a current of 5.0 A and a resistance of 8.0 ohm. Calculate the power dissipated using P = I^2 x R.
- 6th July 2011Why does a bicycle pump get warm when used?
- 7th July 2011A ball decelerates uniformly from 18 m/s to 0 m/s over a distance of 2.7 m while being caught. Using (final velocity)^2 = (initial velocity)^2 + 2 x acceleration x distance, calculate its deceleration.
- 8th July 2011An X-ray has a wavelength of 1 x 10^-10 m. Calculate its frequency (speed of light = 3 x 10^8 m/s).
- 9th July 2011A satellite in a stable, small-radius, close orbit around the Earth is compared with a satellite in a stable, large-radius, distant orbit. State which of the two satellites has the greater orbital speed.
- 10th July 2011What happens to the DNA before mitosis begins?
- 11th July 2011State two conditions that increase the rate of transpiration.
- 12th July 2011A lamp is moved from 15 cm to 30 cm away. What happens to the light intensity?
- 13th July 2011Give one piece of evidence that supports Darwin's theory of evolution by natural selection.
- 14th July 2011Name the biological process that removes carbon dioxide from the atmosphere and converts it into carbon compounds in a plant.
- 15th July 2011State one environmental benefit of recycling aluminium cans rather than making new aluminium from ore.
- 16th July 2011Explain why graphite conducts electricity but diamond does not.
- 17th July 2011State what is observed when magnesium ribbon is added to copper sulfate solution.
- 18th July 2011State the equation for the mean rate of a reaction in terms of the quantity of reactant used.
- 19th July 2011Name the two methods used to produce ethanol industrially.
- 20th July 2011Name the two gases produced by photosynthesis and the substance it consumes alongside carbon dioxide.
- 21st July 2011Calculate the kinetic energy of a 0.5 kg ball moving at 6 m/s.
- 22nd July 2011Name the change of state when a liquid becomes a gas throughout the liquid, at its boiling point.
- 23rd July 2011Explain why americium-241, an alpha emitter, is suitable for use in a smoke detector.
- 24th July 2011State whether sound waves are transverse or longitudinal.
- 25th July 2011State the name of the component at the centre of a transformer's primary and secondary coils, and state its purpose.
- 26th July 2011A student views a red blood cell at a magnification of x2000. The image of the cell measures 20 mm across. Calculate the real width of the cell, giving your answer in micrometres (um).
- 27th July 2011Where is bile made and where is it stored?
- 28th July 2011Why does a vaccinated person not usually become ill when they meet the pathogen?
- 29th July 2011State why a reflex action is described as involuntary.
- 30th July 2011A student counts 3, 5, 4 and 8 dandelion plants in four separate 1 m^2 quadrats. Calculate the mean number of dandelions per quadrat.
- 31st July 2011State the two main steps used to produce potable water from a fresh water source.