Daily Practice · GCSE Science
January 1972 5-a-day
Every sheet in January 1972
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st January 1972A ball decelerates uniformly from 18 m/s to 0 m/s over a distance of 2.7 m while being caught. Using (final velocity)^2 = (initial velocity)^2 + 2 x acceleration x distance, calculate its deceleration.
- 2nd January 1972An X-ray has a wavelength of 1 x 10^-10 m. Calculate its frequency (speed of light = 3 x 10^8 m/s).
- 3rd January 1972A satellite in a stable, small-radius, close orbit around the Earth is compared with a satellite in a stable, large-radius, distant orbit. State which of the two satellites has the greater orbital speed.
- 4th January 1972Where in a plant are stem cells found?
- 5th January 1972Name the process by which dissolved sugars are transported in the phloem.
- 6th January 1972Why is photosynthesis described as endothermic?
- 7th January 1972Give one piece of evidence that supports Darwin's theory of evolution by natural selection.
- 8th January 1972State one human activity that reduces the amount of land available for other organisms.
- 9th January 1972State the two substances that must both be present for iron to rust.
- 10th January 1972State the size range of a nanoparticle.
- 11th January 1972Why is aluminium extracted by electrolysis rather than by reduction with carbon?
- 12th January 1972Explain, using collision theory, why increasing the concentration of a reactant in solution increases the rate of a reaction.
- 13th January 1972Name the two methods used to produce ethanol industrially.
- 14th January 1972Explain, in one sentence, why the oceans were able to form only after the early Earth had cooled.
- 15th January 1972What happens to the energy described as 'wasted' in a transfer?
- 16th January 1972A 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.
- 17th January 1972Explain the difference between irradiation and contamination.
- 18th January 1972State whether sound waves are transverse or longitudinal.
- 19th January 1972State the name of the component at the centre of a transformer's primary and secondary coils, and state its purpose.
- 20th January 1972State one structure found in a bacterial cell but not in an animal cell.
- 21st January 1972Name the products of protein digestion.
- 22nd January 1972State the difference between an antibiotic and a painkiller.
- 23rd January 1972State why a reflex action is described as involuntary.
- 24th January 1972A student counts 3, 5, 4 and 8 dandelion plants in four separate 1 m^2 quadrats. Calculate the mean number of dandelions per quadrat.
- 25th January 1972Define a finite resource, giving one example.
- 26th January 1972State one reason why simple covalent substances such as chlorine have low melting points.
- 27th January 1972Convert 250 cubic centimetres into cubic decimetres.
- 28th January 1972A student heats solid copper carbonate strongly in a test tube, and it breaks down into copper oxide and carbon dioxide. Heating must be continued throughout the reaction for it to keep going. State whether this thermal decomposition reaction is exothermic or endothermic, and explain your reasoning.
- 29th January 1972State what happens to the boiling point of hydrocarbons as their chain length increases.
- 30th January 1972Write the formula for calculating an Rf value.
- 31st January 1972Readings have a mean of 20.0 cm and a range of 1.0 cm. Calculate the percentage uncertainty.