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Daily Practice · GCSE Science

May 1990 5-a-day

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May 1990

31 sheets · 155 questions · GCSE

May 1990 compilationAll answers

Every sheet in May 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 May 1990State the function of the valves in the heart and in veins.
  2. 2nd May 1990Explain why anaerobic respiration releases much less energy per glucose molecule than aerobic respiration.
  3. 3rd May 1990Name the hormone that causes the liver to convert stored glycogen back into glucose.
  4. 4th May 1990The Arctic fox has small, rounded ears compared with the desert fennec fox, which has very large ears. State whether this is a structural, behavioural or functional adaptation, and explain how it helps the Arctic fox survive.
  5. 5th May 1990State what is meant by sustainable development.
  6. 6th May 1990Write the formula of calcium chloride and explain the ratio.
  7. 7th May 1990State the pH value of a neutral solution.
  8. 8th May 1990Hydrogen reacts with chlorine to form hydrogen chloride: H2 + Cl2 -> 2HCl. Use the bond energies given to calculate the overall energy change for this reaction. Bond energies: H-H = 436 kJ/mol, Cl-Cl = 243 kJ/mol, H-Cl = 432 kJ/mol.
  9. 9th May 1990State the type of reaction that occurs when bromine adds across the double bond of an alkene.
  10. 10th May 1990Explain, in terms of infrared radiation, how greenhouse gases keep the Earth warm.
  11. 11th May 1990A motor is supplied with 800 J of energy and wastes 240 J as heat. Calculate its efficiency as a percentage.
  12. 12th May 1990Give the equation linking energy transferred, charge flow and potential difference.
  13. 13th May 1990Who provided the evidence for the existence of the neutron, and roughly when relative to the nuclear model?
  14. 14th May 1990Explain why a rucksack with wide, padded straps is more comfortable to carry than one with thin straps, for the same load.
  15. 15th May 1990State the three factors needed for a current-carrying wire to experience a force due to the motor effect.
  16. 16th May 1990Why does taking repeat readings and calculating a mean improve the data?
  17. 17th May 1990An amylase reaction is complete after 200 seconds. Calculate the rate of reaction using rate = 1000 / time.
  18. 18th May 1990State two ways measles is prevented from spreading.
  19. 19th May 1990A patient's core body temperature has fallen to 35 degrees Celsius. State two physical responses their body makes to raise it back toward normal.
  20. 20th May 1990Explain one reason it took many years for Darwin's theory of evolution by natural selection to become widely accepted.
  21. 21st May 1990An atom has atomic number 11 and mass number 23. State the number of protons.
  22. 22nd May 1990Give two observations when lithium is added to water.
  23. 23rd May 1990State the value of the Avogadro constant and what it counts.
  24. 24th May 1990State whether the combustion of methane is exothermic or endothermic.
  25. 25th May 1990State what is meant by dynamic equilibrium.
  26. 26th May 1990Write the ionic equation for the precipitation reaction between barium ions and sulfate ions.
  27. 27th May 1990Write the equation linking power, energy and time, and rearrange it for time.
  28. 28th May 1990Two resistors are connected in parallel across a 12 V battery. State the potential difference across each resistor.
  29. 29th May 1990A gas is heated in a sealed rigid container. Explain what happens to the pressure.
  30. 30th May 1990A skydiver reaches terminal velocity during free fall. Explain what is meant by 'terminal velocity'.
  31. 31st May 1990State the seven regions of the electromagnetic spectrum in order of increasing frequency.