Daily Practice · GCSE Science
April 2013 - GCSE Science 5-a-day
Every GCSE Science sheet published in April 2013, with answers. Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
Every sheet in April 2013
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 2013State the only substance produced when a hydrogen fuel cell reacts pure hydrogen with pure oxygen.
- 2nd April 2013State the number of covalent bonds a carbon atom forms in a saturated hydrocarbon.
- 3rd April 2013Explain, in terms of infrared radiation, how greenhouse gases keep the Earth warm.
- 4th April 2013A motor is supplied with 800 J of energy and wastes 240 J as heat. Calculate its efficiency as a percentage.
- 5th April 2013Give the colour and function of the earth wire.
- 6th April 2013What observation showed the nucleus is positively charged and very small?
- 7th April 2013State the equation that links pressure, force and area.
- 8th April 2013In a simple d.c. electric motor, state the name and function of the component that reverses the current in the coil every half turn.
- 9th April 2013A student measures 24 cubic centimetres of gas in 3 minutes. Calculate the rate.
- 10th April 2013An amylase reaction is complete after 200 seconds. Calculate the rate of reaction using rate = 1000 / time.
- 11th April 2013Give one way of reducing the spread of malaria.
- 12th April 2013Name the gland that monitors and controls blood glucose concentration.
- 13th April 2013Explain why genetic engineering can introduce a new characteristic in a single generation, while selective breeding cannot.
- 14th April 2013An atom has atomic number 11 and mass number 23. State the number of protons.
- 15th April 2013Why do elements in the same group have similar chemical properties?
- 16th April 2013Why is the amount of product directly proportional to the amount of limiting reactant?
- 17th April 2013State whether the combustion of methane is exothermic or endothermic.
- 18th April 2013State the two named reactants used in the Haber process.
- 19th April 2013A solution forms a green precipitate with sodium hydroxide solution. Which ion is present?
- 20th April 2013Give the equation for wave speed and its units.
- 21st April 2013Two resistors are connected in parallel across a 12 V battery. State the potential difference across each resistor.
- 22nd April 2013Why does reducing the volume of a gas increase the pressure even though the molecules do not speed up?
- 23rd April 2013A 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.
- 24th April 2013An X-ray has a wavelength of 1 x 10^-10 m. Calculate its frequency (speed of light = 3 x 10^8 m/s).
- 25th April 2013A 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.
- 26th April 2013Give one risk of stem cell treatment.
- 27th April 2013Why does a potometer measure water uptake rather than transpiration directly?
- 28th April 2013Why does the rate of photosynthesis fall at very high temperatures?
- 29th April 2013Give one piece of evidence that supports Darwin's theory of evolution by natural selection.
- 30th April 2013Explain why large-scale deforestation increases the concentration of carbon dioxide in the atmosphere.