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Daily Practice · GCSE Science

July 1983 5-a-day

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July 1983

31 sheets · 155 questions · GCSE

July 1983 compilationAll answers

Every sheet in July 1983

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 1983A 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.
  2. 2nd July 1983Explain why electricity is transmitted through the National Grid at a very high voltage rather than at the voltage used in homes.
  3. 3rd July 1983A cube-shaped model cell has sides of length 3 cm. Calculate the surface area to volume ratio of the cube. Give your answer in the form n : 1.
  4. 4th July 1983State two functions of bile.
  5. 5th July 1983What is an antigen?
  6. 6th July 1983Name the chemical released at a synapse that carries the signal across the gap.
  7. 7th July 1983Explain why deforestation to create land for cattle grazing can reduce biodiversity.
  8. 8th July 1983Name the four stages usually considered in a life cycle assessment of a product.
  9. 9th July 1983A student says that metals conduct electricity because they contain free-moving ions. Explain why this statement is incorrect, and give the correct explanation.
  10. 10th July 1983State two reasons why a percentage yield is less than 100 percent.
  11. 11th July 1983State what is meant by the activation energy of a reaction.
  12. 12th July 1983State two products, other than water, that can be formed during the incomplete combustion of a hydrocarbon.
  13. 13th July 1983Explain why the baseline is drawn in pencil rather than ink.
  14. 14th July 1983Give one reason for taking the gradient from the line of best fit rather than from two data points.
  15. 15th July 1983State the equation linking potential difference, current and resistance.
  16. 16th July 1983Define half-life.
  17. 17th July 1983Explain why a larger vehicle mass increases braking distance.
  18. 18th July 1983State the type of force that always acts between an induced magnet and the magnet that induced it.
  19. 19th July 1983Name the model of the origin of the universe that is supported by red-shift observations.
  20. 20th July 1983Define osmosis.
  21. 21st July 1983Which type of pathogen causes athlete's foot, a fungal skin infection?
  22. 22nd July 1983Define oxygen debt.
  23. 23rd July 1983Explain one benefit of the Human Genome Project.
  24. 24th July 1983A gas syringe collects 48 cubic centimetres of gas in 40 seconds. Calculate the mean rate.
  25. 25th July 1983Why do isotopes of an element react in the same way?
  26. 26th July 1983Calculate the Mr of calcium carbonate, CaCO3. (Ca = 40, C = 12, O = 16)
  27. 27th July 1983Explain why solid sodium chloride does not conduct electricity, but molten sodium chloride does.
  28. 28th July 1983In the gas-volume required practical measuring how concentration affects rate, state one variable that should be controlled.
  29. 29th July 1983State the reagent added, and the result, that shows a white solid contains sulfate ions.
  30. 30th July 1983State the two products of the complete combustion of a hydrocarbon fuel.
  31. 31st July 1983State one way to increase the efficiency of a motor.