Daily Practice · GCSE Science
October 2011 - GCSE Science 5-a-day
Every GCSE Science sheet published in October 2011, with answers. Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
Every sheet in October 2011
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st October 2011Why does a potometer measure water uptake rather than transpiration directly?
- 2nd October 2011Why does the rate of photosynthesis fall at very high temperatures?
- 3rd October 2011A plant grown in the shade is shorter than a genetically identical plant of the same species grown in full sunlight. State whether this difference is genetic variation, environmental variation, or both.
- 4th October 2011Explain why large-scale deforestation increases the concentration of carbon dioxide in the atmosphere.
- 5th October 2011State the four stages considered in a life cycle assessment.
- 6th October 2011Why does simple molecular carbon dioxide have a much lower melting point than giant covalent silicon dioxide?
- 7th October 2011Define oxidation in terms of electrons.
- 8th October 2011State two units that the rate of a reaction can be measured in.
- 9th October 2011Name the small molecule typically released as a by-product during condensation polymerisation.
- 10th October 2011Explain, in terms of gas molecules, why methane and water vapour, as well as carbon dioxide, are described as greenhouse gases.
- 11th October 2011A 3 kg object is raised 2 m. Calculate the gravitational potential energy gained. (g = 9.8 N/kg)
- 12th October 2011A block has a volume of 50 cm^3 and a mass of 135 g. Calculate its density.
- 13th October 2011A GM tube detects a count rate of 240 counts per minute from a source. After 15 days the count rate has fallen to 30 counts per minute. Show that this data is consistent with a half-life of 5 days.
- 14th October 2011A water wave has a frequency of 4 Hz and a wavelength of 0.5 m. Calculate its speed.
- 15th October 2011A transformer's primary coil is connected to a 12 V supply and has 60 turns. Calculate the number of turns needed on the secondary coil to produce an output of 3.0 V.
- 16th October 2011A cube-shaped model cell has sides of length 3 cm. Calculate the surface area to volume ratio of the cube. Give your answer in the form n : 1.
- 17th October 2011State two functions of bile.
- 18th October 2011What is an antigen?
- 19th October 2011Define a synapse.
- 20th October 2011Give one example of an abiotic factor that could affect where a plant species grows.
- 21st October 2011Name the four stages usually considered in a life cycle assessment of a product.
- 22nd October 2011A student says that metals conduct electricity because they contain free-moving ions. Explain why this statement is incorrect, and give the correct explanation.
- 23rd October 2011State two reasons why a percentage yield is less than 100 percent.
- 24th October 2011State what is meant by the activation energy of a reaction.
- 25th October 2011State the general formula of the alkanes.
- 26th October 2011Explain why the baseline is drawn in pencil rather than ink.
- 27th October 2011Give one reason for taking the gradient from the line of best fit rather than from two data points.
- 28th October 2011State the equation linking potential difference, current and resistance.
- 29th October 2011Define half-life.
- 30th October 2011Calculate the momentum of a 1200 kg car travelling at 18 m/s.
- 31st October 2011Explain why a compass needle placed just outside one end of a current-carrying solenoid lines up parallel to the solenoid's axis.