Daily Practice · GCSE Science
August 1990 5-a-day
Every sheet in August 1990
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st August 1990Name the energy store associated with a moving car.
- 2nd August 1990Why does the national grid transmit electricity at a very high potential difference?
- 3rd August 1990Why is the atomic model a good example of how scientific models change?
- 4th August 1990Write down the equation that links moment, force and distance.
- 5th August 1990A wire of length 0.20 m carries a current of 5.0 A at right angles to a magnetic field of flux density 0.60 T. Calculate the force on the wire.
- 6th August 1990Define the independent variable.
- 7th August 1990State the type of large biological molecule that all enzymes are made from.
- 8th August 1990Name the type of pathogen that causes malaria.
- 9th August 1990Explain, in terms of blood vessels, how the skin helps to cool the body when it is too hot.
- 10th August 1990Define speciation.
- 11th August 1990A 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.
- 12th August 1990Why are the noble gases unreactive?
- 13th August 1990How many atoms are there in 0.5 mol of helium?
- 14th August 1990Using the values in the previous question, calculate the overall energy change for the reaction.
- 15th August 1990State the catalyst commonly used in the Haber process.
- 16th August 1990Describe the test, and the positive result, for ammonium ions.
- 17th August 1990Convert 3.5 kJ into joules.
- 18th August 1990A resistor of resistance 15 ohm is connected to a 6.0 V supply. Calculate the current flowing through it. Use V = I x R.
- 19th August 1990How is the temperature of a gas related to the motion of its molecules?
- 20th August 1990Define the term 'vector quantity' and give one example.
- 21st August 1990Name the type of electromagnetic wave used to treat cancer by killing cells in a tumour, and state which part of the atom emits it.
- 22nd August 1990State one difference between a moon and an artificial satellite.
- 23rd August 1990How many pairs of chromosomes are there in a human body cell?
- 24th August 1990Where are most stomata found on a typical leaf, and why?
- 25th August 1990Name four limiting factors of photosynthesis.
- 26th August 1990Define phenotype.
- 27th August 1990State what is meant by the term biodiversity.
- 28th August 1990Give one reason a manufacturer's own life cycle assessment of its product might not be fully objective.
- 29th August 1990Give one use of nanoparticles and one associated risk.
- 30th August 1990Give the ionic equation for neutralisation.
- 31st August 1990State what is shown on a rate graph when the line for the volume of gas produced becomes horizontal (flat).