Daily Practice · GCSE Science
September 1981 5-a-day
Every sheet in September 1981
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st September 1981A lamp is moved from 15 cm to 30 cm away. What happens to the light intensity?
- 2nd September 1981Define phenotype.
- 3rd September 1981Name the biological process that removes carbon dioxide from the atmosphere and converts it into carbon compounds in a plant.
- 4th September 1981State one environmental benefit of recycling aluminium cans rather than making new aluminium from ore.
- 5th September 1981Explain why graphite conducts electricity but diamond does not.
- 6th September 1981State what is observed when magnesium ribbon is added to copper sulfate solution.
- 7th September 1981State the equation for the mean rate of a reaction in terms of the quantity of reactant used.
- 8th September 1981Name the type of biological molecule formed when amino acid monomers join together by condensation polymerisation.
- 9th September 1981Describe, in terms of wavelength, the difference between the radiation the Earth receives from the Sun and the radiation it re-emits from its surface.
- 10th September 1981Calculate the kinetic energy of a 0.5 kg ball moving at 6 m/s.
- 11th September 1981State what happens to the internal energy of a substance as it is heated, in terms of the kinetic and potential energy of its particles.
- 12th September 1981Explain why americium-241, an alpha emitter, is suitable for use in a smoke detector.
- 13th September 1981A radio wave has a wavelength of 3 m. Calculate its frequency, given that all electromagnetic waves travel at 3 x 10^8 m/s in a vacuum.
- 14th September 1981Explain why electricity is transmitted through the National Grid at a very high voltage rather than at the voltage used in homes.
- 15th September 1981A microscope has a x10 eyepiece lens and a x20 objective lens. Calculate the total magnification.
- 16th September 1981Where is bile made and where is it stored?
- 17th September 1981Why does a vaccinated person not usually become ill when they meet the pathogen?
- 18th September 1981Name the chemical released at a synapse that carries the signal across the gap.
- 19th September 1981Explain why deforestation to create land for cattle grazing can reduce biodiversity.
- 20th September 1981Explain why potable water is not the same as pure water.
- 21st September 1981Explain why sodium chloride conducts electricity when molten but not when solid.
- 22nd September 1981Calculate the concentration in moles per cubic decimetre of a solution containing 0.5 mol in 250 cubic centimetres.
- 23rd September 1981State the energy transfer that occurs during an endothermic reaction.
- 24th September 1981State two products, other than water, that can be formed during the incomplete combustion of a hydrocarbon.
- 25th September 1981A sample produces only one spot when run in three different solvents. What does this suggest about the sample?
- 26th September 1981Why should a line of best fit be drawn rather than joining the plotted points?
- 27th September 1981In a parallel circuit, how do the branch currents relate to the total current?
- 28th September 1981State the approximate radius of an atom.
- 29th September 1981Explain why a larger vehicle mass increases braking distance.
- 30th September 1981State the type of force that always acts between an induced magnet and the magnet that induced it.