Daily Practice · GCSE Science
May 1993 - GCSE Science 5-a-day
Every sheet in May 1993
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st May 1993Name the type of electromagnetic wave used by a television remote control.
- 2nd May 1993Explain why a satellite moving in a stable circular orbit has a changing velocity even though its speed stays constant.
- 3rd May 1993Give one advantage of therapeutic cloning over using unrelated embryonic stem cells.
- 4th May 1993Why are xylem cells strengthened with lignin?
- 5th May 1993Why is glucose converted into starch for storage?
- 6th May 1993Explain, using the idea of natural selection, why a population of insects can become resistant to a pesticide over time.
- 7th May 1993State one way in which high biodiversity benefits an ecosystem.
- 8th May 1993Explain how painting an iron gate helps prevent it from rusting.
- 9th May 1993Why can an ionic solid not conduct electricity?
- 10th May 1993Name the salt made from zinc oxide and nitric acid.
- 11th May 1993State what is meant by a catalyst.
- 12th May 1993Name the carboxylic acid produced when ethanol is oxidised.
- 13th May 1993State two long-term stores of carbon that removed carbon dioxide from the early atmosphere.
- 14th May 1993Define specific heat capacity.
- 15th May 1993Calculate the energy needed to melt 0.50 kg of a substance with a specific latent heat of fusion of 210000 J/kg.
- 16th May 1993State the number of protons and the number of neutrons in an alpha particle.
- 17th May 1993Define the term 'wavelength' of a wave.
- 18th May 1993State the difference between an alternator and a dynamo.
- 19th May 1993Name the structure in a plant cell that controls the substances entering and leaving the cell.
- 20th May 1993Why does a food test for sugars need a water bath?
- 21st May 1993Explain what is meant by a double blind trial.
- 22nd May 1993State the type of effector that produces a physical response by contracting.
- 23rd May 1993Give one example of a biotic factor that could affect a population of rabbits.
- 24th May 1993Name two methods of desalinating seawater.
- 25th May 1993Name the giant covalent structure made of carbon in which each carbon atom is bonded to four others.
- 26th May 1993Give the formula for atom economy.
- 27th May 1993Explain, in terms of the reaction pathway, why adding a catalyst increases the rate of a reaction without changing the overall energy change of the reaction.
- 28th May 1993Balance the equation for the complete combustion of methane: CH4 + O2 -> CO2 + H2O
- 29th May 1993State one advantage of running known reference substances alongside an unknown sample on the same chromatogram, rather than only comparing to published Rf values.
- 30th May 1993How is the uncertainty in a set of repeated readings usually estimated?
- 31st May 1993Define electric current.