Daily Practice · GCSE Science
December 1986 5-a-day
Every sheet in December 1986
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st December 1986Explain why a plant cell placed in pure water does not burst.
- 2nd December 1986A student measures the mean diameter of a zone of inhibition as 12 mm. Calculate its radius.
- 3rd December 1986Explain, in terms of respiration, why a build-up of lactic acid causes muscle fatigue during vigorous exercise.
- 4th December 1986A man has genotype XY. State his sex, and state which sex chromosomes are found in the sperm cells he produces.
- 5th December 1986In the rate experiment where a cross disappears, why is the result subjective?
- 6th December 1986An atom has an atomic number of 17 and a mass number of 37. How many neutrons does it have?
- 7th December 1986Calculate the number of moles in 20 g of calcium carbonate. (Mr = 100)
- 8th December 1986In the industrial extraction of aluminium, explain why the aluminium oxide is dissolved in molten cryolite rather than melted on its own.
- 9th December 1986Explain why increasing the surface area of a solid reactant increases the rate of a reaction.
- 10th December 1986A solid gives a lilac flame test. Name the metal ion present.
- 11th December 1986Name the two additional products that can form during the incomplete combustion of a hydrocarbon fuel.
- 12th December 1986Give the equation for efficiency in terms of energy.
- 13th December 1986Calculate the mass of 0.5 cubic metres of a material of density 2400 kilograms per cubic metre.
- 14th December 1986A resultant force of 45 N acts on an object of mass 9.0 kg. Calculate its acceleration. Use F = m x a.
- 15th December 1986A wave has a frequency of 50 Hz. Calculate its period.
- 16th December 1986Explain, in terms of forces, why an orbiting satellite does not travel off in a straight line.
- 17th December 1986State the function of the mitochondria.
- 18th December 1986Which component of blood transports carbon dioxide, urea and hormones?
- 19th December 1986State three factors that can limit the rate of photosynthesis.
- 20th December 1986State one risk factor linked to type 2 diabetes.
- 21st December 1986A student places ten 1 m x 1 m quadrats at random across a school field of area 3000 m2 and counts a total of 45 dandelions across all ten quadrats. Estimate the total number of dandelions on the field.
- 22nd December 1986Explain, in terms of particle size, how reverse osmosis separates water from dissolved salt.
- 23rd December 1986Why can metals conduct electricity when solid?
- 24th December 1986Explain why aluminium cannot be extracted from aluminium oxide by heating with carbon.
- 25th December 1986State whether forming a new chemical bond requires energy or releases energy.
- 26th December 1986Define the term 'homologous series'.
- 27th December 1986Name three greenhouse gases.
- 28th December 1986A kettle transfers 360000 J of energy in 150 s. Calculate its power in watts.
- 29th December 1986What is the difference between alternating and direct current?
- 30th December 1986What observation showed that the atom is mostly empty space?
- 31st December 1986Write down the equation that links moment, force and distance.