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Daily Practice · GCSE Science

January 1989 5-a-day

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January 1989

31 sheets · 155 questions · GCSE

January 1989 compilationAll answers

Every sheet in January 1989

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 1989State whether breaking a chemical bond requires energy or releases energy.
  2. 2nd January 1989State the general formula of the alkenes.
  3. 3rd January 1989Explain, in terms of infrared radiation, how greenhouse gases keep the Earth warm.
  4. 4th January 1989A motor is supplied with 800 J of energy and wastes 240 J as heat. Calculate its efficiency as a percentage.
  5. 5th January 1989Why does the national grid transmit electricity at a very high potential difference?
  6. 6th January 1989Why is the atomic model a good example of how scientific models change?
  7. 7th January 1989A box of weight 120 N has a base area of 0.40 m^2. Calculate the pressure it exerts on the ground.
  8. 8th January 1989Explain why a current-carrying wire positioned exactly parallel to a magnetic field experiences no force.
  9. 9th January 1989Define the independent variable.
  10. 10th January 1989An amylase reaction is complete after 200 seconds. Calculate the rate of reaction using rate = 1000 / time.
  11. 11th January 1989Name the type of pathogen that causes malaria.
  12. 12th January 1989Name the three parts common to every homeostatic control system.
  13. 13th January 1989State one advantage and one disadvantage of selective breeding in farm animals.
  14. 14th January 1989An atom has atomic number 11 and mass number 23. State the number of protons.
  15. 15th January 1989Why are the noble gases unreactive?
  16. 16th January 1989How many atoms are there in 0.5 mol of helium?
  17. 17th January 1989State whether the combustion of methane is exothermic or endothermic.
  18. 18th January 1989In the Haber process, N2(g) + 3H2(g) -> 2NH3(g), state the effect of decreasing the pressure on the position of equilibrium.
  19. 19th January 1989Describe the test, and the positive result, for ammonium ions.
  20. 20th January 1989Convert 3.5 kJ into joules.
  21. 21st January 1989Two resistors are connected in parallel across a 12 V battery. State the potential difference across each resistor.
  22. 22nd January 1989How is the temperature of a gas related to the motion of its molecules?
  23. 23rd January 1989A train travels at a constant velocity of 40 m/s for 3 minutes. Calculate the distance it travels, in km.
  24. 24th January 1989A microwave oven uses electromagnetic waves with a wavelength of 0.12 m. Calculate the frequency of these waves (speed of light = 3 x 10^8 m/s).
  25. 25th January 1989Put the following in order of increasing distance from the Sun: Mars, Venus, Saturn, Earth.
  26. 26th January 1989How many pairs of chromosomes are there in a human body cell?
  27. 27th January 1989Where are most stomata found on a typical leaf, and why?
  28. 28th January 1989Name four limiting factors of photosynthesis.
  29. 29th January 1989Name the three-domain system of classification, and name the scientist most associated with proposing it.
  30. 30th January 1989State what is meant by the term biodiversity.
  31. 31st January 1989Give one reason a manufacturer's own life cycle assessment of its product might not be fully objective.