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Daily Practice · GCSE Science

January 1973 5-a-day

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January 1973

31 sheets · 155 questions · GCSE

January 1973 compilationAll answers

Every sheet in January 1973

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

  1. 1st January 1973Explain why breathing rate and breathing depth both increase during exercise.
  2. 2nd January 1973In pea plants, purple flower colour (allele H) is dominant over white flower colour (allele h). State the phenotype of a plant with genotype Hh.
  3. 3rd January 1973Give the resolution of a burette that can be read to the nearest half of a small division.
  4. 4th January 1973Why is an atom electrically neutral?
  5. 5th January 1973State the law of conservation of mass.
  6. 6th January 1973State the two materials commonly used as inert electrodes in electrolysis, and explain why they must be inert.
  7. 7th January 1973Explain how a catalyst increases the rate of a reaction without being used up.
  8. 8th January 1973Give one piece of evidence that a solid sample is impure, based on its melting behaviour.
  9. 9th January 1973Explain why carbon monoxide is dangerous even though it has no smell.
  10. 10th January 1973Why can no device be 100 percent efficient?
  11. 11th January 1973Why is melting described as a physical change?
  12. 12th January 1973State whether friction is a contact force or a non-contact force.
  13. 13th January 1973Give one everyday example of a transverse wave and one everyday example of a longitudinal wave.
  14. 14th January 1973State what happens to the orbital speed needed for a stable orbit as the orbital radius increases.
  15. 15th January 1973Convert 0.05 mm into micrometres.
  16. 16th January 1973State the function of the valves in the heart and in veins.
  17. 17th January 1973Complete the word equation for anaerobic respiration in yeast: glucose -> ___ + ___
  18. 18th January 1973Explain why type 1 diabetes is treated with insulin injections rather than tablets.
  19. 19th January 1973The 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.
  20. 20th January 1973Give one reason distillation of seawater requires a large energy input.
  21. 21st January 1973Write the formula of calcium chloride and explain the ratio.
  22. 22nd January 1973A 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.
  23. 23rd January 1973Hydrogen 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.
  24. 24th January 1973Name the alkene with the molecular formula C4H8.
  25. 25th January 1973Name the two gases released in large amounts by volcanic activity that formed most of the Earth's early atmosphere.
  26. 26th January 1973Name the energy store associated with a moving car.
  27. 27th January 1973Give the equation linking energy transferred, charge flow and potential difference.
  28. 28th January 1973Who provided the evidence for the existence of the neutron, and roughly when relative to the nuclear model?
  29. 29th January 1973A spanner is used to loosen a bolt. Explain why using a longer spanner makes it easier to loosen the bolt.
  30. 30th January 1973State two ways of increasing the force produced by a motor effect setup, for a wire of fixed length at a fixed angle to the field.
  31. 31st January 1973Why does taking repeat readings and calculating a mean improve the data?