Daily Practice · GCSE Science
October 1981 5-a-day
Every sheet in October 1981
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st October 1981Name the model of the origin of the universe that is supported by red-shift observations.
- 2nd October 1981Give one adaptation of a root hair cell for absorbing mineral ions.
- 3rd October 1981Explain why a small number of healthy volunteers are given a very low dose of a new drug in the first stage of a clinical trial.
- 4th October 1981Define oxygen debt.
- 5th October 1981Explain one benefit of the Human Genome Project.
- 6th October 1981Why is a polystyrene cup with a lid used in energy-change experiments?
- 7th October 1981Write the electronic structure of a magnesium atom (12 electrons).
- 8th October 1981A student measures the mass of a beaker of hydrochloric acid and marble chips as they react and finds it falls. Explain why.
- 9th October 1981Explain why solid sodium chloride does not conduct electricity, but molten sodium chloride does.
- 10th October 1981In the gas-volume required practical measuring how concentration affects rate, state one variable that should be controlled.
- 11th October 1981Name the gas that relights a glowing splint.
- 12th October 1981Name two gases that dissolve in atmospheric water droplets to cause acid rain.
- 13th October 1981Define power and give its unit.
- 14th October 1981Convert a density of 2.7 grams per cubic centimetre into kilograms per cubic metre.
- 15th October 1981A cyclist rides 300 m north then 300 m back south to the start. State the total distance travelled and total displacement.
- 16th October 1981A wave travels from air into glass and slows down. State what happens to its direction, and explain why in terms of wavelength.
- 17th October 1981State what a nebula is, and explain its role in the life cycle of a star.
- 18th October 1981Give one advantage of a light microscope over an electron microscope.
- 19th October 1981Name the blood vessel that carries deoxygenated blood from the heart to the lungs.
- 20th October 1981A lamp is placed 10 cm from pondweed. Calculate the relative light intensity using relative light intensity = 1 / distance^2.
- 21st October 1981Name the hormone released by the adrenal glands that prepares the body for fight or flight.
- 22nd October 1981Thermus 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 1981Classify crude oil as finite or renewable, and justify your answer.
- 24th October 1981Why can an ionic compound conduct electricity when molten or dissolved but not when solid?
- 25th October 1981Calculate the number of moles of sodium hydroxide in 200 cm3 of a 0.500 mol/dm3 solution.
- 26th October 1981State the only substance produced when a hydrogen fuel cell reacts pure hydrogen with pure oxygen.
- 27th October 1981State the general formula of the alkenes.
- 28th October 1981Give two human activities that increase the amount of greenhouse gases in the atmosphere.
- 29th October 1981A 5.0 kg object is lifted 3.0 m. Calculate its gain in gravitational potential energy (g = 9.8 N/kg).
- 30th October 1981Give the colour and function of the earth wire.
- 31st October 1981What observation showed the nucleus is positively charged and very small?