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Daily Practice · GCSE Science

July 1991 5-a-day

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July 1991

31 sheets · 155 questions · GCSE

July 1991 compilationAll answers

Every sheet in July 1991

The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.

  1. 1st July 1991Name the organ system responsible for breaking food down into small, soluble molecules.
  2. 2nd July 1991Describe the symptoms of rose black spot and its effect on the plant.
  3. 3rd July 1991Define homeostasis.
  4. 4th July 1991Give one example of variation that is caused purely by the environment rather than by genes.
  5. 5th July 1991An atom has atomic number 9 and mass number 19. Calculate the number of neutrons.
  6. 6th July 1991Why did Mendeleev leave gaps in his table?
  7. 7th July 1991Calculate the mass of 0.25 mol of sodium hydroxide, NaOH. (Na = 23, O = 16, H = 1)
  8. 8th July 1991Give one everyday example of an endothermic process.
  9. 9th July 1991In the Haber process, state the effect of removing some ammonia from the equilibrium mixture as it forms on the position of equilibrium.
  10. 10th July 1991State the flame test colour for sodium ions.
  11. 11th July 1991Calculate the gravitational potential energy gained by a 60 kg person climbing 5 m. (g = 9.8 N/kg)
  12. 12th July 1991A current of 2.0 A flows through a resistor for 30 s. Calculate the charge that flows. Use Q = I x t.
  13. 13th July 1991A gas at 200 kPa occupies 3.0 cubic metres. It is compressed to 1.5 cubic metres at constant temperature. Calculate the new pressure.
  14. 14th July 1991A runner completes a 400 m race in 52 s. Calculate her average speed, giving your answer to 3 significant figures.
  15. 15th July 1991Name the type of electromagnetic wave used by a television remote control.
  16. 16th July 1991Explain why a satellite moving in a stable circular orbit has a changing velocity even though its speed stays constant.
  17. 17th July 1991State three functions of mitosis.
  18. 18th July 1991What happens to guard cells when a plant is short of water?
  19. 19th July 1991Write the word equation for photosynthesis.
  20. 20th July 1991Explain, using the idea of natural selection, why a population of insects can become resistant to a pesticide over time.
  21. 21st July 1991State one method used to try to maintain biodiversity.
  22. 22nd July 1991Explain, using the reactivity series, why attaching blocks of zinc to the hull of a steel ship helps prevent the steel from rusting.
  23. 23rd July 1991Why is graphite soft and slippery?
  24. 24th July 1991Explain the difference between a strong acid and a concentrated acid.
  25. 25th July 1991A reaction between calcium carbonate and hydrochloric acid produces 72 cm3 of carbon dioxide gas in 30 seconds. Calculate the mean rate of reaction.
  26. 26th July 1991Name the carboxylic acid produced when ethanol is oxidised.
  27. 27th July 1991Explain, in terms of gas molecules, why methane and water vapour, as well as carbon dioxide, are described as greenhouse gases.
  28. 28th July 1991Name four energy stores.
  29. 29th July 1991A block has a volume of 50 cm^3 and a mass of 135 g. Calculate its density.
  30. 30th July 1991State one source of natural background radiation and one source of artificial (man-made) background radiation.
  31. 31st July 1991Define the term 'wavelength' of a wave.