Daily Practice · GCSE Science
May 1971 5-a-day
Every sheet in May 1971
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st May 1971Explain why ultraviolet, X-rays and gamma rays can be hazardous to human health, but radio waves are not.
- 2nd May 1971Explain, in terms of forces, why a satellite in a stable orbit does not fall towards the Earth or fly off into space.
- 3rd May 1971Give one advantage of therapeutic cloning over using unrelated embryonic stem cells.
- 4th May 1971Why are xylem cells strengthened with lignin?
- 5th May 1971Why is glucose converted into starch for storage?
- 6th May 1971In 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.
- 7th May 1971State one way in which high biodiversity benefits an ecosystem.
- 8th May 1971Explain how painting an iron gate helps prevent it from rusting.
- 9th May 1971Why can an ionic solid not conduct electricity?
- 10th May 1971Name the salt made from zinc oxide and nitric acid.
- 11th May 1971State what is meant by a catalyst.
- 12th May 1971State what happens to the carbon-to-carbon double bond of an alkene monomer during addition polymerisation.
- 13th May 1971Explain, in terms of gas molecules, why methane and water vapour, as well as carbon dioxide, are described as greenhouse gases.
- 14th May 1971Define specific heat capacity.
- 15th May 1971A block has a volume of 50 cm^3 and a mass of 135 g. Calculate its density.
- 16th May 1971State the number of protons and the number of neutrons in an alpha particle.
- 17th May 1971Name the type of electromagnetic wave used to sterilise medical equipment.
- 18th May 1971A 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.
- 19th May 1971A 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.
- 20th May 1971Why does a food test for sugars need a water bath?
- 21st May 1971Explain what is meant by a double blind trial.
- 22nd May 1971Explain why reflex responses are faster than voluntary responses.
- 23rd May 1971Define community, in ecological terms.
- 24th May 1971Name the four stages usually considered in a life cycle assessment of a product.
- 25th May 1971A student says that metals conduct electricity because they contain free-moving ions. Explain why this statement is incorrect, and give the correct explanation.
- 26th May 1971Give the formula for atom economy.
- 27th May 1971Explain, 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 1971Name the two industrial methods of cracking.
- 29th May 1971State 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 1971How is the uncertainty in a set of repeated readings usually estimated?
- 31st May 1971Define electric current.