Daily Practice · GCSE Science
July 1985 5-a-day
Every sheet in July 1985
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st July 1985Name the salt made from zinc oxide and nitric acid.
- 2nd July 1985State what is meant by a catalyst.
- 3rd July 1985State the functional group found in all alcohols.
- 4th July 1985Explain, in one sentence, why the oceans were able to form only after the early Earth had cooled.
- 5th July 1985Define specific heat capacity.
- 6th July 1985A 1.5 kg block of iron is heated from 18 degrees C to 98 degrees C. The specific heat capacity of iron is 450 J/(kg degrees C). Calculate the change in thermal energy.
- 7th July 1985State the number of protons and the number of neutrons in an alpha particle.
- 8th July 1985State what happens to the frequency of a wave when it is refracted as it passes into a different material.
- 9th July 1985State two factors that increase the size of the potential difference induced in a coil.
- 10th July 1985State one structure found in a bacterial cell but not in an animal cell.
- 11th July 1985Why does a food test for sugars need a water bath?
- 12th July 1985Explain what is meant by a double blind trial.
- 13th July 1985Put these into the correct order for a reflex arc: motor neuron, receptor, effector, relay neuron, sensory neuron.
- 14th July 1985State one structural adaptation of a polar bear that helps it survive in a cold environment.
- 15th July 1985Define a finite resource, giving one example.
- 16th July 1985State one reason why simple covalent substances such as chlorine have low melting points.
- 17th July 1985Give the formula for atom economy.
- 18th July 1985Explain, 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.
- 19th July 1985Name the process used to separate crude oil into fractions.
- 20th July 1985State one advantage of running known reference substances alongside an unknown sample on the same chromatogram, rather than only comparing to published Rf values.
- 21st July 1985How is the uncertainty in a set of repeated readings usually estimated?
- 22nd July 1985Define electric current.
- 23rd July 1985A source has a half-life of 5 days and an initial activity of 1600 Bq. What is its activity after 15 days?
- 24th July 1985State Newton's First Law of Motion.
- 25th July 1985Two bar magnets are placed with their north poles facing each other. State what happens to the magnets.
- 26th July 1985State what is meant by red-shift.
- 27th July 1985Calculate the surface area to volume ratio of a cube of side 2 cm.
- 28th July 1985A student measures the mean diameter of a zone of inhibition as 12 mm. Calculate its radius.
- 29th July 1985Explain why breathing rate and breathing depth both increase during exercise.
- 30th July 1985In pea plants, purple flower colour (allele H) is dominant over white flower colour (allele h). State the phenotype of a plant with genotype Hh.
- 31st July 1985Give the resolution of a burette that can be read to the nearest half of a small division.