Daily Practice · GCSE Science
September 1966 5-a-day
Every sheet in September 1966
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st September 1966Why does a food test for sugars need a water bath?
- 2nd September 1966Explain what is meant by a double blind trial.
- 3rd September 1966State why a reflex action is described as involuntary.
- 4th September 1966A student counts 3, 5, 4 and 8 dandelion plants in four separate 1 m^2 quadrats. Calculate the mean number of dandelions per quadrat.
- 5th September 1966Define a finite resource, giving one example.
- 6th September 1966State one reason why simple covalent substances such as chlorine have low melting points.
- 7th September 1966Give the formula for atom economy.
- 8th September 1966Explain, 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.
- 9th September 1966State what happens to the boiling point of hydrocarbons as their chain length increases.
- 10th September 1966State one advantage of running known reference substances alongside an unknown sample on the same chromatogram, rather than only comparing to published Rf values.
- 11th September 1966How is the uncertainty in a set of repeated readings usually estimated?
- 12th September 1966Define electric current.
- 13th September 1966A source has a half-life of 5 days and an initial activity of 1600 Bq. What is its activity after 15 days?
- 14th September 1966A skateboarder of mass 55 kg moving at 4 m/s collides with and grabs onto a stationary shopping trolley of mass 20 kg, and they move off together. Calculate their combined velocity immediately after the collision.
- 15th September 1966Describe the shape of the magnetic field produced around a long straight wire carrying a current.
- 16th September 1966State how the amount of red-shift is related to a galaxy's distance from Earth.
- 17th September 1966Calculate the surface area to volume ratio of a cube of side 2 cm.
- 18th September 1966A student measures the mean diameter of a zone of inhibition as 12 mm. Calculate its radius.
- 19th September 1966State the word equation for anaerobic respiration in human muscle cells.
- 20th September 1966State whether cystic fibrosis is caused by a dominant or a recessive allele.
- 21st September 1966Give the resolution of a burette that can be read to the nearest half of a small division.
- 22nd September 1966Why is an atom electrically neutral?
- 23rd September 1966State the law of conservation of mass.
- 24th September 1966Aqueous copper sulfate solution is electrolysed using inert graphite electrodes. State the products formed at (a) the cathode and (b) the anode, giving a reason for each.
- 25th September 1966In the disappearing cross required practical, state the dependent variable that is measured.
- 26th September 1966Give one piece of evidence that a solid sample is impure, based on its melting behaviour.
- 27th September 1966Explain why carbon monoxide is dangerous even though it has no smell.
- 28th September 1966Why can no device be 100 percent efficient?
- 29th September 1966Why is melting described as a physical change?
- 30th September 1966A resultant force of 45 N acts on an object of mass 9.0 kg. Calculate its acceleration. Use F = m x a.