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Daily Practice · GCSE Science

July 1987 5-a-day

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July 1987

31 sheets · 155 questions · GCSE

July 1987 compilationAll answers

Every sheet in July 1987

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 1987Explain, in terms of forces, why a satellite in a stable orbit does not fall towards the Earth or fly off into space.
  2. 2nd July 1987How many pairs of chromosomes are there in a human body cell?
  3. 3rd July 1987Where are most stomata found on a typical leaf, and why?
  4. 4th July 1987Name four limiting factors of photosynthesis.
  5. 5th July 1987In pea plants, the allele for tall stems (T) is dominant over the allele for short stems (t). A homozygous tall plant (TT) is crossed with a homozygous short plant (tt). State the genotype and phenotype of all the offspring.
  6. 6th July 1987State what is meant by the term biodiversity.
  7. 7th July 1987Give one reason a manufacturer's own life cycle assessment of its product might not be fully objective.
  8. 8th July 1987Give one use of nanoparticles and one associated risk.
  9. 9th July 1987Give the ionic equation for neutralisation.
  10. 10th July 1987State what is shown on a rate graph when the line for the volume of gas produced becomes horizontal (flat).
  11. 11th July 1987State what happens to the carbon-to-carbon double bond of an alkene monomer during addition polymerisation.
  12. 12th July 1987Explain, in terms of gas molecules, why methane and water vapour, as well as carbon dioxide, are described as greenhouse gases.
  13. 13th July 1987State the equation for gravitational potential energy.
  14. 14th July 1987A block has a volume of 50 cm^3 and a mass of 135 g. Calculate its density.
  15. 15th July 1987Radium-226 (atomic number 88) decays by alpha emission. State the atomic number of the nucleus formed.
  16. 16th July 1987Name the type of electromagnetic wave used to sterilise medical equipment.
  17. 17th July 1987A transformer has a primary current of 2.0 A and a primary voltage of 230 V. The secondary voltage is 460 V. Assuming the transformer is 100 percent efficient, calculate the secondary current.
  18. 18th July 1987A 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.
  19. 19th July 1987Explain what happens to an enzyme above its optimum temperature.
  20. 20th July 1987Name three non-specific defences of the human body.
  21. 21st July 1987Explain why reflex responses are faster than voluntary responses.
  22. 22nd July 1987Define community, in ecological terms.
  23. 23rd July 1987Name the four stages usually considered in a life cycle assessment of a product.
  24. 24th July 1987A student says that metals conduct electricity because they contain free-moving ions. Explain why this statement is incorrect, and give the correct explanation.
  25. 25th July 1987Convert a concentration of 0.20 moles per cubic decimetre of NaOH into grams per cubic decimetre. (Mr = 40)
  26. 26th July 1987State the energy transfer that occurs during an exothermic reaction.
  27. 27th July 1987Name the two industrial methods of cracking.
  28. 28th July 1987In a chromatography experiment, a dye spot travels 4.5 cm and the solvent front travels 6.0 cm. Calculate its Rf value.
  29. 29th July 1987Define the resolution of a measuring instrument.
  30. 30th July 1987Two 4 ohm resistors are connected in series. Calculate the total resistance.
  31. 31st July 1987Which type of radiation is stopped by a sheet of paper?