Daily Practice · GCSE Science
August 1979 5-a-day
Every sheet in August 1979
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st August 1979A motor is supplied with 800 J of energy and wastes 240 J as heat. Calculate its efficiency as a percentage.
- 2nd August 1979Why does the national grid transmit electricity at a very high potential difference?
- 3rd August 1979Why is the atomic model a good example of how scientific models change?
- 4th August 1979Explain why a rucksack with wide, padded straps is more comfortable to carry than one with thin straps, for the same load.
- 5th August 1979State the three factors needed for a current-carrying wire to experience a force due to the motor effect.
- 6th August 1979Define the independent variable.
- 7th August 1979An amylase reaction is complete after 200 seconds. Calculate the rate of reaction using rate = 1000 / time.
- 8th August 1979Name the type of pathogen that causes malaria.
- 9th August 1979A patient's core body temperature has fallen to 35 degrees Celsius. State two physical responses their body makes to raise it back toward normal.
- 10th August 1979Explain one reason it took many years for Darwin's theory of evolution by natural selection to become widely accepted.
- 11th August 1979An atom has atomic number 11 and mass number 23. State the number of protons.
- 12th August 1979Why are the noble gases unreactive?
- 13th August 1979How many atoms are there in 0.5 mol of helium?
- 14th August 1979State whether the combustion of methane is exothermic or endothermic.
- 15th August 1979State what is meant by dynamic equilibrium.
- 16th August 1979Describe the test, and the positive result, for ammonium ions.
- 17th August 1979Convert 3.5 kJ into joules.
- 18th August 1979Two resistors are connected in parallel across a 12 V battery. State the potential difference across each resistor.
- 19th August 1979How is the temperature of a gas related to the motion of its molecules?
- 20th August 1979A skydiver reaches terminal velocity during free fall. Explain what is meant by 'terminal velocity'.
- 21st August 1979State the seven regions of the electromagnetic spectrum in order of increasing frequency.
- 22nd August 1979State what provides the centripetal force that keeps a planet in orbit around the Sun.
- 23rd August 1979How many pairs of chromosomes are there in a human body cell?
- 24th August 1979Where are most stomata found on a typical leaf, and why?
- 25th August 1979Name four limiting factors of photosynthesis.
- 26th August 1979Define the term allele.
- 27th August 1979State what is meant by the term biodiversity.
- 28th August 1979Give one reason a manufacturer's own life cycle assessment of its product might not be fully objective.
- 29th August 1979Give one use of nanoparticles and one associated risk.
- 30th August 1979Give the ionic equation for neutralisation.
- 31st August 1979State what is shown on a rate graph when the line for the volume of gas produced becomes horizontal (flat).