Daily Practice · GCSE Science
January 1981 5-a-day
Every sheet in January 1981
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st January 1981Explain why steel (an alloy of iron and carbon) is generally harder than pure iron.
- 2nd January 1981Why do polymers have higher melting points than small molecules such as methane?
- 3rd January 1981Complete: acid + metal carbonate gives ...
- 4th January 1981State the four factors that can increase the rate of a chemical reaction.
- 5th January 1981Name the two methods used to produce ethanol industrially.
- 6th January 1981Explain why the natural greenhouse effect is necessary for life on Earth, rather than being a purely harmful process.
- 7th January 1981By what factor does kinetic energy increase if speed is doubled?
- 8th January 1981State the correct SI unit for density.
- 9th January 1981Define the term 'half-life' of a radioactive isotope.
- 10th January 1981State whether sound waves are transverse or longitudinal.
- 11th January 1981State the name of the component at the centre of a transformer's primary and secondary coils, and state its purpose.
- 12th January 1981Convert 0.02 mm into micrometres (um).
- 13th January 1981Describe the positive result of the Biuret test.
- 14th January 1981What is tested during preclinical testing?
- 15th January 1981State why a reflex action is described as involuntary.
- 16th January 1981A student counts 3, 5, 4 and 8 dandelion plants in four separate 1 m^2 quadrats. Calculate the mean number of dandelions per quadrat.
- 17th January 1981State one benefit of recycling metal rather than extracting new metal from its ore.
- 18th January 1981Name the three types of strong chemical bonding.
- 19th January 1981Why do companies prefer reactions with a high atom economy?
- 20th January 1981On a reaction profile diagram, the reactants are drawn at a higher energy level than the products. State whether the reaction is exothermic or endothermic.
- 21st January 1981State what happens to the boiling point of hydrocarbons as their chain length increases.
- 22nd January 1981Explain why the solvent level in the container must be below the pencil baseline.
- 23rd January 1981In the specific heat capacity practical, why is the block insulated?
- 24th January 1981Describe the current-potential difference graph for a filament lamp.
- 25th January 1981State the difference between irradiation and contamination.
- 26th January 1981A 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.
- 27th January 1981Describe the shape of the magnetic field produced around a long straight wire carrying a current.
- 28th January 1981State how the amount of red-shift is related to a galaxy's distance from Earth.
- 29th January 1981Name the process that moves substances against a concentration gradient.
- 30th January 1981State one way that pathogens can be spread from person to person.
- 31st January 1981State the word equation for anaerobic respiration in human muscle cells.