Daily Practice · GCSE Science
November 2013 - GCSE Science 5-a-day
Every GCSE Science sheet published in November 2013, with answers. Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
Every sheet in November 2013
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st November 2013Define the term 'hydrocarbon'.
- 2nd November 2013State one advantage of running known reference substances alongside an unknown sample on the same chromatogram, rather than only comparing to published Rf values.
- 3rd November 2013How is the uncertainty in a set of repeated readings usually estimated?
- 4th November 2013Define electric current.
- 5th November 2013A source has a half-life of 5 days and an initial activity of 1600 Bq. What is its activity after 15 days?
- 6th November 2013A shopping trolley has a mass of 25 kg. Calculate its weight, taking g = 9.8 N/kg.
- 7th November 2013A student wraps a coil of insulated wire around an iron nail and connects it to a battery. Name the device this creates, and state one way to increase its magnetic field strength.
- 8th November 2013Explain why red-shift observations support the idea that the universe is expanding, rather than Earth simply being at the centre of the universe with everything moving away from it.
- 9th November 2013Calculate the surface area to volume ratio of a cube of side 2 cm.
- 10th November 2013A student measures the mean diameter of a zone of inhibition as 12 mm. Calculate its radius.
- 11th November 2013Explain, in terms of respiration, why a build-up of lactic acid causes muscle fatigue during vigorous exercise.
- 12th November 2013A man has genotype XY. State his sex, and state which sex chromosomes are found in the sperm cells he produces.
- 13th November 2013Give the resolution of a burette that can be read to the nearest half of a small division.
- 14th November 2013Why is an atom electrically neutral?
- 15th November 2013State the law of conservation of mass.
- 16th November 2013In the industrial extraction of aluminium, explain why the aluminium oxide is dissolved in molten cryolite rather than melted on its own.
- 17th November 2013Explain why increasing the surface area of a solid reactant increases the rate of a reaction.
- 18th November 2013Give one piece of evidence that a solid sample is impure, based on its melting behaviour.
- 19th November 2013Explain why carbon monoxide is dangerous even though it has no smell.
- 20th November 2013Why can no device be 100 percent efficient?
- 21st November 2013Why is melting described as a physical change?
- 22nd November 2013A resultant force of 45 N acts on an object of mass 9.0 kg. Calculate its acceleration. Use F = m x a.
- 23rd November 2013A wave has a frequency of 50 Hz. Calculate its period.
- 24th November 2013Explain, in terms of forces, why an orbiting satellite does not travel off in a straight line.
- 25th November 2013Convert 0.05 mm into micrometres.
- 26th November 2013State the function of the valves in the heart and in veins.
- 27th November 2013State three factors that can limit the rate of photosynthesis.
- 28th November 2013State one risk factor linked to type 2 diabetes.
- 29th November 2013The Arctic fox has small, rounded ears compared with the desert fennec fox, which has very large ears. State whether this is a structural, behavioural or functional adaptation, and explain how it helps the Arctic fox survive.
- 30th November 2013Explain, in terms of particle size, how reverse osmosis separates water from dissolved salt.