Daily Practice · GCSE Science
December 1987 5-a-day
Every sheet in December 1987
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st December 1987A sample contains 90% of an isotope with mass number 10 and 10% of an isotope with mass number 11. Calculate the relative atomic mass, to 1 decimal place.
- 2nd December 1987Explain why potassium is more reactive than sodium.
- 3rd December 1987Calculate the number of moles in 88 g of carbon dioxide. (Mr = 44)
- 4th December 1987Using the values in the previous question, calculate the overall energy change for the reaction.
- 5th December 1987In the Haber process, state the effect of removing some ammonia from the equilibrium mixture as it forms on the position of equilibrium.
- 6th December 1987A solution gives a cream precipitate when acidified with dilute nitric acid and then treated with silver nitrate solution. Name the halide ion present.
- 7th December 1987A device transfers 4500 J in 90 s. Calculate its power.
- 8th December 1987A resistor of resistance 15 ohm is connected to a 6.0 V supply. Calculate the current flowing through it. Use V = I x R.
- 9th December 1987Why does a bicycle pump get warm when used?
- 10th December 1987A runner completes a 400 m race in 52 s. Calculate her average speed, giving your answer to 3 significant figures.
- 11th December 1987Name the type of electromagnetic wave used by a television remote control.
- 12th December 1987Explain why a satellite moving in a stable circular orbit has a changing velocity even though its speed stays constant.
- 13th December 1987What happens to the DNA before mitosis begins?
- 14th December 1987State two conditions that increase the rate of transpiration.
- 15th December 1987A lamp is moved from 15 cm to 30 cm away. What happens to the light intensity?
- 16th December 1987Explain, using the idea of natural selection, why a population of insects can become resistant to a pesticide over time.
- 17th December 1987Name the biological process that removes carbon dioxide from the atmosphere and converts it into carbon compounds in a plant.
- 18th December 1987State one environmental benefit of recycling aluminium cans rather than making new aluminium from ore.
- 19th December 1987Explain why graphite conducts electricity but diamond does not.
- 20th December 1987State what is observed when magnesium ribbon is added to copper sulfate solution.
- 21st December 1987State the equation for the mean rate of a reaction in terms of the quantity of reactant used.
- 22nd December 1987Name the carboxylic acid produced when ethanol is oxidised.
- 23rd December 1987State two long-term stores of carbon that removed carbon dioxide from the early atmosphere.
- 24th December 1987Calculate the kinetic energy of a 0.5 kg ball moving at 6 m/s.
- 25th December 1987Calculate the energy needed to melt 0.50 kg of a substance with a specific latent heat of fusion of 210000 J/kg.
- 26th December 1987Explain why americium-241, an alpha emitter, is suitable for use in a smoke detector.
- 27th December 1987Define the term 'wavelength' of a wave.
- 28th December 1987State the difference between an alternator and a dynamo.
- 29th December 1987Name the structure in a plant cell that controls the substances entering and leaving the cell.
- 30th December 1987Where is bile made and where is it stored?
- 31st December 1987Why does a vaccinated person not usually become ill when they meet the pathogen?