Daily Practice · GCSE Science
October 1998 - GCSE Science 5-a-day
Every sheet in October 1998
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st October 1998Name the carboxylic acid produced when ethanol is oxidised.
- 2nd October 1998State two long-term stores of carbon that removed carbon dioxide from the early atmosphere.
- 3rd October 1998What happens to the energy described as 'wasted' in a transfer?
- 4th October 1998Calculate the energy needed to melt 0.50 kg of a substance with a specific latent heat of fusion of 210000 J/kg.
- 5th October 1998Explain the difference between irradiation and contamination.
- 6th October 1998Define the term 'wavelength' of a wave.
- 7th October 1998State the difference between an alternator and a dynamo.
- 8th October 1998Name the structure in a plant cell that controls the substances entering and leaving the cell.
- 9th October 1998Name the products of protein digestion.
- 10th October 1998State the difference between an antibiotic and a painkiller.
- 11th October 1998State the type of effector that produces a physical response by contracting.
- 12th October 1998Give one example of a biotic factor that could affect a population of rabbits.
- 13th October 1998Name two methods of desalinating seawater.
- 14th October 1998Name the giant covalent structure made of carbon in which each carbon atom is bonded to four others.
- 15th October 1998Convert 250 cubic centimetres into cubic decimetres.
- 16th October 1998A student heats solid copper carbonate strongly in a test tube, and it breaks down into copper oxide and carbon dioxide. Heating must be continued throughout the reaction for it to keep going. State whether this thermal decomposition reaction is exothermic or endothermic, and explain your reasoning.
- 17th October 1998Balance the equation for the complete combustion of methane: CH4 + O2 -> CO2 + H2O
- 18th October 1998Write the formula for calculating an Rf value.
- 19th October 1998Readings have a mean of 20.0 cm and a range of 1.0 cm. Calculate the percentage uncertainty.
- 20th October 1998What happens to the total resistance when a second resistor is added in parallel, and why?
- 21st October 1998What happens inside the nucleus when a beta particle is emitted?
- 22nd October 1998State two factors that increase a driver's thinking distance.
- 23rd October 1998Name a typical material used to make a permanent magnet, and a typical material used to make an induced (temporary) magnet.
- 24th October 1998State, in one sentence, what the Big Bang model proposes about the early universe.
- 25th October 1998State three factors that increase the rate of diffusion.
- 26th October 1998Describe how phagocytes destroy pathogens in the body.
- 27th October 1998A yeast culture respires without oxygen. Name the two products of this reaction, and name one industrial process that relies on it.
- 28th October 1998A man who is a known carrier of cystic fibrosis (Ff) has children with a woman who has been confirmed to carry no cystic fibrosis allele at all (FF). Explain why none of their children can have cystic fibrosis.
- 29th October 1998What does 'concordant' mean when applied to titres?
- 30th October 1998What did the alpha scattering experiment show that the plum pudding model could not explain?
- 31st October 1998Magnesium is burned in an open crucible and the mass increases. Explain why.