Daily Practice · GCSE Science
October 1971 5-a-day
Every sheet in October 1971
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st October 1971Give one example of variation that is caused purely by the environment rather than by genes.
- 2nd October 1971A sample contains 90% of an isotope with mass number 10 and 10% of an isotope with mass number 11. Calculate the relative atomic mass, to 1 decimal place.
- 3rd October 1971Why are the noble gases unreactive?
- 4th October 1971How many atoms are there in 0.5 mol of helium?
- 5th October 1971Using the values in the previous question, calculate the overall energy change for the reaction.
- 6th October 1971In the Haber process, state the effect of removing some ammonia from the equilibrium mixture as it forms on the position of equilibrium.
- 7th October 1971Describe the test, and the positive result, for ammonium ions.
- 8th October 1971Convert 3.5 kJ into joules.
- 9th October 1971A resistor of resistance 15 ohm is connected to a 6.0 V supply. Calculate the current flowing through it. Use V = I x R.
- 10th October 1971How is the temperature of a gas related to the motion of its molecules?
- 11th October 1971A runner completes a 400 m race in 52 s. Calculate her average speed, giving your answer to 3 significant figures.
- 12th October 1971Name the type of electromagnetic wave used by a television remote control.
- 13th October 1971Explain why a satellite moving in a stable circular orbit has a changing velocity even though its speed stays constant.
- 14th October 1971How many pairs of chromosomes are there in a human body cell?
- 15th October 1971Where are most stomata found on a typical leaf, and why?
- 16th October 1971Name four limiting factors of photosynthesis.
- 17th October 1971Explain, using the idea of natural selection, why a population of insects can become resistant to a pesticide over time.
- 18th October 1971State what is meant by the term biodiversity.
- 19th October 1971Give one reason a manufacturer's own life cycle assessment of its product might not be fully objective.
- 20th October 1971Give one use of nanoparticles and one associated risk.
- 21st October 1971Give the ionic equation for neutralisation.
- 22nd October 1971State what is shown on a rate graph when the line for the volume of gas produced becomes horizontal (flat).
- 23rd October 1971Name the carboxylic acid produced when ethanol is oxidised.
- 24th October 1971State two long-term stores of carbon that removed carbon dioxide from the early atmosphere.
- 25th October 1971State the equation for gravitational potential energy.
- 26th October 1971Calculate the energy needed to melt 0.50 kg of a substance with a specific latent heat of fusion of 210000 J/kg.
- 27th October 1971Radium-226 (atomic number 88) decays by alpha emission. State the atomic number of the nucleus formed.
- 28th October 1971Define the term 'wavelength' of a wave.
- 29th October 1971State the difference between an alternator and a dynamo.
- 30th October 1971Name the structure in a plant cell that controls the substances entering and leaving the cell.
- 31st October 1971Explain what happens to an enzyme above its optimum temperature.