Daily Practice · GCSE Science
February 1976 5-a-day
Every sheet in February 1976
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st February 1976State the number of protons and the number of neutrons in an alpha particle.
- 2nd February 1976Explain why ultraviolet radiation can be harmful to human skin.
- 3rd February 1976State two ways of inducing a potential difference across a conductor using a magnetic field.
- 4th February 1976State one structure found in a bacterial cell but not in an animal cell.
- 5th February 1976Why does a food test for sugars need a water bath?
- 6th February 1976Explain what is meant by a double blind trial.
- 7th February 1976A ruler is released and falls 20 cm before being caught. Using distance = 0.5 x g x time^2 with g = 9.8 m/s^2, calculate the reaction time, to 3 significant figures.
- 8th February 1976Name the equipment used to measure the abundance of a small plant species within a sample area.
- 9th February 1976Define a finite resource, giving one example.
- 10th February 1976State one reason why simple covalent substances such as chlorine have low melting points.
- 11th February 1976Give the formula for atom economy.
- 12th February 1976Explain, 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.
- 13th February 1976Define the term 'hydrocarbon'.
- 14th February 1976State one advantage of running known reference substances alongside an unknown sample on the same chromatogram, rather than only comparing to published Rf values.
- 15th February 1976How is the uncertainty in a set of repeated readings usually estimated?
- 16th February 1976Define electric current.
- 17th February 1976A source has a half-life of 5 days and an initial activity of 1600 Bq. What is its activity after 15 days?
- 18th February 1976A shopping trolley has a mass of 25 kg. Calculate its weight, taking g = 9.8 N/kg.
- 19th February 1976A student wraps a coil of insulated wire around an iron nail and connects it to a battery. Name the device this creates, and state one way to increase its magnetic field strength.
- 20th February 1976Explain why red-shift observations support the idea that the universe is expanding, rather than Earth simply being at the centre of the universe with everything moving away from it.
- 21st February 1976Calculate the surface area to volume ratio of a cube of side 2 cm.
- 22nd February 1976A student measures the mean diameter of a zone of inhibition as 12 mm. Calculate its radius.
- 23rd February 1976Explain, in terms of respiration, why a build-up of lactic acid causes muscle fatigue during vigorous exercise.
- 24th February 1976A man has genotype XY. State his sex, and state which sex chromosomes are found in the sperm cells he produces.
- 25th February 1976Give the resolution of a burette that can be read to the nearest half of a small division.
- 26th February 1976Why is an atom electrically neutral?
- 27th February 1976State the law of conservation of mass.
- 28th February 1976In the industrial extraction of aluminium, explain why the aluminium oxide is dissolved in molten cryolite rather than melted on its own.
- 29th February 1976Explain why increasing the surface area of a solid reactant increases the rate of a reaction.