Daily Practice · GCSE Science
August 1970 5-a-day
Every sheet in August 1970
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st August 1970In a grassland food chain, the biomass of grass available is 8400 kg and the biomass transferred to the rabbits that eat it is 940 kg. Calculate the percentage efficiency of biomass transfer from grass to rabbits, to 3 significant figures.
- 2nd August 1970Explain why potable water is not required to be chemically pure.
- 3rd August 1970Give the charge on an ion formed by a group 2 element.
- 4th August 1970State the name given to a reaction in which a substance loses electrons.
- 5th August 1970State one factor that affects the size of the voltage produced by a chemical cell.
- 6th August 1970State the type of reaction that occurs when bromine adds across the double bond of an alkene.
- 7th August 1970Give two processes that removed carbon dioxide from the early atmosphere.
- 8th August 1970Calculate the kinetic energy of a 2.0 kg trolley moving at 4.0 m/s.
- 9th August 1970Why is the live wire dangerous even when a device is switched off?
- 10th August 1970Describe the plum pudding model.
- 11th August 1970Explain why a rucksack with wide, padded straps is more comfortable to carry than one with thin straps, for the same load.
- 12th August 1970State the three factors needed for a current-carrying wire to experience a force due to the motor effect.
- 13th August 1970Name the apparatus used to estimate the population of a slow-moving or non-moving species in a field.
- 14th August 1970Explain why the rate of an enzyme-controlled reaction decreases sharply above the enzyme's optimum temperature.
- 15th August 1970Define a communicable disease.
- 16th August 1970A patient's core body temperature has fallen to 35 degrees Celsius. State two physical responses their body makes to raise it back toward normal.
- 17th August 1970Explain one reason it took many years for Darwin's theory of evolution by natural selection to become widely accepted.
- 18th August 1970Write the electronic structure of an atom with 12 electrons.
- 19th August 1970Explain why potassium is more reactive than sodium.
- 20th August 1970Calculate the number of moles in 88 g of carbon dioxide. (Mr = 44)
- 21st August 1970A reaction profile shows the reactants at 220 kJ and the products at 340 kJ. State whether the reaction is exothermic or endothermic.
- 22nd August 1970State what is meant by dynamic equilibrium.
- 23rd August 1970A solution gives a cream precipitate when acidified with dilute nitric acid and then treated with silver nitrate solution. Name the halide ion present.
- 24th August 1970A device transfers 4500 J in 90 s. Calculate its power.
- 25th August 1970State the UK mains supply frequency and typical potential difference.
- 26th August 1970Why does a bicycle pump get warm when used?
- 27th August 1970A skydiver reaches terminal velocity during free fall. Explain what is meant by 'terminal velocity'.
- 28th August 1970State the seven regions of the electromagnetic spectrum in order of increasing frequency.
- 29th August 1970State what provides the centripetal force that keeps a planet in orbit around the Sun.
- 30th August 1970What happens to the DNA before mitosis begins?
- 31st August 1970State two conditions that increase the rate of transpiration.