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Daily Practice · GCSE Science

July 1990 5-a-day

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July 1990

31 sheets · 155 questions · GCSE

July 1990 compilationAll answers

Every sheet in July 1990

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 1990State the difference between irradiation and contamination.
  2. 2nd July 1990A shopping trolley has a mass of 25 kg. Calculate its weight, taking g = 9.8 N/kg.
  3. 3rd July 1990A student wraps a coil of insulated wire around an iron nail and connects it to a battery. Name the device this creates, and state one way to increase its magnetic field strength.
  4. 4th July 1990Explain why red-shift observations support the idea that the universe is expanding, rather than Earth simply being at the centre of the universe with everything moving away from it.
  5. 5th July 1990Name the process that moves substances against a concentration gradient.
  6. 6th July 1990State one way that pathogens can be spread from person to person.
  7. 7th July 1990Explain, in terms of respiration, why a build-up of lactic acid causes muscle fatigue during vigorous exercise.
  8. 8th July 1990A man has genotype XY. State his sex, and state which sex chromosomes are found in the sperm cells he produces.
  9. 9th July 1990Why is the burette rinsed with the solution it is going to contain rather than with water?
  10. 10th July 1990State the relative mass and relative charge of a neutron.
  11. 11th July 1990Calculate the Mr of Ca(OH)2. (Ca = 40, O = 16, H = 1)
  12. 12th July 1990In the industrial extraction of aluminium, explain why the aluminium oxide is dissolved in molten cryolite rather than melted on its own.
  13. 13th July 1990Explain why increasing the surface area of a solid reactant increases the rate of a reaction.
  14. 14th July 1990Which reagent is added, and in what colour change, to test for chlorine gas?
  15. 15th July 1990Explain how solid carbon particulates released by combustion can cause global dimming.
  16. 16th July 1990A lamp is supplied with 60 J and transfers 6 J as light. Calculate its efficiency as a percentage.
  17. 17th July 1990Define specific latent heat of fusion.
  18. 18th July 1990State whether friction is a contact force or a non-contact force.
  19. 19th July 1990A wave has a frequency of 50 Hz. Calculate its period.
  20. 20th July 1990Explain, in terms of forces, why an orbiting satellite does not travel off in a straight line.
  21. 21st July 1990Give the equation linking magnification, image size and real size.
  22. 22nd July 1990Give one advantage and one disadvantage of a stent.
  23. 23rd July 1990Complete the word equation for anaerobic respiration in yeast: glucose -> ___ + ___
  24. 24th July 1990State one risk factor linked to type 2 diabetes.
  25. 25th July 1990State what is meant by the term ecosystem.
  26. 26th July 1990Give one reason distillation of seawater requires a large energy input.
  27. 27th July 1990Describe metallic bonding.
  28. 28th July 1990A student reacts 2.4 g of magnesium with excess dilute hydrochloric acid: Mg + 2HCl -> MgCl2 + H2. Relative atomic mass of Mg = 24. Calculate the number of moles of hydrogen gas produced.
  29. 29th July 1990State whether breaking a chemical bond requires energy or releases energy.
  30. 30th July 1990Define the term 'homologous series'.
  31. 31st July 1990Name the two gases released in large amounts by volcanic activity that formed most of the Earth's early atmosphere.