Daily Practice · GCSE Science
February 1984 5-a-day
Every sheet in February 1984
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st February 1984Why does taking repeat readings and calculating a mean improve the data?
- 2nd February 1984Explain why the rate of an enzyme-controlled reaction decreases sharply above the enzyme's optimum temperature.
- 3rd February 1984State two ways measles is prevented from spreading.
- 4th February 1984State what is meant by negative feedback.
- 5th February 1984Name the scientist who proposed the three-domain system of classification, and name the three domains.
- 6th February 1984Write the electronic structure of an atom with 12 electrons.
- 7th February 1984Give two observations when lithium is added to water.
- 8th February 1984State the value of the Avogadro constant and what it counts.
- 9th February 1984A reaction profile shows the reactants at 220 kJ and the products at 340 kJ. State whether the reaction is exothermic or endothermic.
- 10th February 1984State the effect of increasing the temperature on the position of equilibrium of a reaction whose forward reaction is exothermic.
- 11th February 1984Write the ionic equation for the precipitation reaction between barium ions and sulfate ions.
- 12th February 1984Write the equation linking power, energy and time, and rearrange it for time.
- 13th February 1984State the UK mains supply frequency and typical potential difference.
- 14th February 1984A gas is heated in a sealed rigid container. Explain what happens to the pressure.
- 15th February 1984A car's velocity increases from 8 m/s to 20 m/s over 4 seconds. Calculate its acceleration.
- 16th February 1984State one medical use of X-rays and one safety precaution taken when X-rays are used in a hospital.
- 17th February 1984State two uses of artificial satellites.
- 18th February 1984Define an undifferentiated cell.
- 19th February 1984Which tissue transports water and mineral ions from the roots?
- 20th February 1984Give three uses of the glucose produced in photosynthesis.
- 21st February 1984State one difference between selective breeding and genetic engineering.
- 22nd February 1984A peat bog covered an area of 850 hectares in 2015. By 2025, drainage for farmland had reduced the peat bog to 680 hectares. Calculate the percentage decrease in the area of the peat bog.
- 23rd February 1984Explain why steel (an alloy of iron and carbon) is generally harder than pure iron.
- 24th February 1984Why do polymers have higher melting points than small molecules such as methane?
- 25th February 1984Complete: acid + metal carbonate gives ...
- 26th February 1984State the four factors that can increase the rate of a chemical reaction.
- 27th February 1984State the functional group found in all carboxylic acids.
- 28th February 1984Explain, in one sentence, why the oceans were able to form only after the early Earth had cooled.
- 29th February 1984By what factor does kinetic energy increase if speed is doubled?