Daily Practice · GCSE Science
October 1970 5-a-day
Every sheet in October 1970
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st October 1970Explain why red-shift observations support the idea that the universe is expanding, rather than Earth simply being at the centre of the universe with everything moving away from it.
- 2nd October 1970Give one adaptation of a root hair cell for absorbing mineral ions.
- 3rd October 1970A student measures the mean diameter of a zone of inhibition as 12 mm. Calculate its radius.
- 4th October 1970Explain, in terms of respiration, why a build-up of lactic acid causes muscle fatigue during vigorous exercise.
- 5th October 1970A man has genotype XY. State his sex, and state which sex chromosomes are found in the sperm cells he produces.
- 6th October 1970Why is a polystyrene cup with a lid used in energy-change experiments?
- 7th October 1970Write the electronic structure of a magnesium atom (12 electrons).
- 8th October 1970A student measures the mass of a beaker of hydrochloric acid and marble chips as they react and finds it falls. Explain why.
- 9th October 1970In the industrial extraction of aluminium, explain why the aluminium oxide is dissolved in molten cryolite rather than melted on its own.
- 10th October 1970Explain why increasing the surface area of a solid reactant increases the rate of a reaction.
- 11th October 1970Name the gas that relights a glowing splint.
- 12th October 1970Name two gases that dissolve in atmospheric water droplets to cause acid rain.
- 13th October 1970Define power and give its unit.
- 14th October 1970Convert a density of 2.7 grams per cubic centimetre into kilograms per cubic metre.
- 15th October 1970A resultant force of 45 N acts on an object of mass 9.0 kg. Calculate its acceleration. Use F = m x a.
- 16th October 1970A wave has a frequency of 50 Hz. Calculate its period.
- 17th October 1970Explain, in terms of forces, why an orbiting satellite does not travel off in a straight line.
- 18th October 1970Give one advantage of a light microscope over an electron microscope.
- 19th October 1970Name the blood vessel that carries deoxygenated blood from the heart to the lungs.
- 20th October 1970State three factors that can limit the rate of photosynthesis.
- 21st October 1970State one risk factor linked to type 2 diabetes.
- 22nd October 1970Thermus aquaticus is a species of bacterium that lives in hot springs at temperatures that would kill most other organisms. State the name given to an organism that is adapted to survive in such extreme conditions.
- 23rd October 1970Explain, in terms of particle size, how reverse osmosis separates water from dissolved salt.
- 24th October 1970Why can an ionic compound conduct electricity when molten or dissolved but not when solid?
- 25th October 1970Explain why aluminium cannot be extracted from aluminium oxide by heating with carbon.
- 26th October 1970State the only substance produced when a hydrogen fuel cell reacts pure hydrogen with pure oxygen.
- 27th October 1970Define the term 'homologous series'.
- 28th October 1970Name three greenhouse gases.
- 29th October 1970A kettle transfers 360000 J of energy in 150 s. Calculate its power in watts.
- 30th October 1970Give the colour and function of the earth wire.
- 31st October 1970What observation showed the nucleus is positively charged and very small?