Daily Practice · GCSE Science
October 2007 - GCSE Science 5-a-day
Every GCSE Science sheet published in October 2007, with answers. Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
Every sheet in October 2007
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st October 2007A 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.
- 2nd October 2007Describe the positive result of the Biuret test.
- 3rd October 2007What is tested during preclinical testing?
- 4th October 2007State the type of effector that produces a physical response by contracting.
- 5th October 2007Give one example of a biotic factor that could affect a population of rabbits.
- 6th October 2007Name the four stages usually considered in a life cycle assessment of a product.
- 7th October 2007A student says that metals conduct electricity because they contain free-moving ions. Explain why this statement is incorrect, and give the correct explanation.
- 8th October 2007Why do companies prefer reactions with a high atom economy?
- 9th October 2007On a reaction profile diagram, the reactants are drawn at a higher energy level than the products. State whether the reaction is exothermic or endothermic.
- 10th October 2007Balance the equation for the complete combustion of methane: CH4 + O2 -> CO2 + H2O
- 11th October 2007Explain why the solvent level in the container must be below the pencil baseline.
- 12th October 2007In the specific heat capacity practical, why is the block insulated?
- 13th October 2007Describe the current-potential difference graph for a filament lamp.
- 14th October 2007State the difference between irradiation and contamination.
- 15th October 2007State two factors that increase a driver's thinking distance.
- 16th October 2007Name a typical material used to make a permanent magnet, and a typical material used to make an induced (temporary) magnet.
- 17th October 2007State, in one sentence, what the Big Bang model proposes about the early universe.
- 18th October 2007Name the process that moves substances against a concentration gradient.
- 19th October 2007Which type of pathogen causes athlete's foot, a fungal skin infection?
- 20th October 2007A yeast culture respires without oxygen. Name the two products of this reaction, and name one industrial process that relies on it.
- 21st October 2007A 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.
- 22nd October 2007Why is the burette rinsed with the solution it is going to contain rather than with water?
- 23rd October 2007State the relative mass and relative charge of a neutron.
- 24th October 2007Calculate the Mr of Ca(OH)2. (Ca = 40, O = 16, H = 1)
- 25th October 2007Concentrated sodium chloride solution (brine) is electrolysed using inert electrodes. State the products formed at the cathode and at the anode.
- 26th October 2007Explain why increasing temperature increases the rate of a reaction, referring to both the frequency and the energy of collisions.
- 27th October 2007Which reagent is added, and in what colour change, to test for chlorine gas?
- 28th October 2007Explain how solid carbon particulates released by combustion can cause global dimming.
- 29th October 2007A lamp is supplied with 60 J and transfers 6 J as light. Calculate its efficiency as a percentage.
- 30th October 2007Define specific latent heat of fusion.
- 31st October 2007A box has a driving force of 250 N forward and friction of 180 N backward. Calculate the resultant force, including its direction.