Daily Practice · GCSE Science
February 2003 - GCSE Science 5-a-day
Every GCSE Science sheet published in February 2003, with answers. Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
Every sheet in February 2003
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st February 2003Explain, in terms of respiration, why a build-up of lactic acid causes muscle fatigue during vigorous exercise.
- 2nd February 2003A man has genotype XY. State his sex, and state which sex chromosomes are found in the sperm cells he produces.
- 3rd February 2003Why is the burette rinsed with the solution it is going to contain rather than with water?
- 4th February 2003State the relative mass and relative charge of a neutron.
- 5th February 2003Calculate the Mr of Ca(OH)2. (Ca = 40, O = 16, H = 1)
- 6th February 2003In the industrial extraction of aluminium, explain why the aluminium oxide is dissolved in molten cryolite rather than melted on its own.
- 7th February 2003Explain why increasing the surface area of a solid reactant increases the rate of a reaction.
- 8th February 2003Which reagent is added, and in what colour change, to test for chlorine gas?
- 9th February 2003Explain how solid carbon particulates released by combustion can cause global dimming.
- 10th February 2003A lamp is supplied with 60 J and transfers 6 J as light. Calculate its efficiency as a percentage.
- 11th February 2003Define specific latent heat of fusion.
- 12th February 2003A resultant force of 45 N acts on an object of mass 9.0 kg. Calculate its acceleration. Use F = m x a.
- 13th February 2003A wave has a frequency of 50 Hz. Calculate its period.
- 14th February 2003Explain, in terms of forces, why an orbiting satellite does not travel off in a straight line.
- 15th February 2003Give the equation linking magnification, image size and real size.
- 16th February 2003Give one advantage and one disadvantage of a stent.
- 17th February 2003State three factors that can limit the rate of photosynthesis.
- 18th February 2003State one risk factor linked to type 2 diabetes.
- 19th February 2003State what is meant by the term ecosystem.
- 20th February 2003Explain, in terms of particle size, how reverse osmosis separates water from dissolved salt.
- 21st February 2003Describe metallic bonding.
- 22nd February 2003Explain why aluminium cannot be extracted from aluminium oxide by heating with carbon.
- 23rd February 2003State whether breaking a chemical bond requires energy or releases energy.
- 24th February 2003Define the term 'homologous series'.
- 25th February 2003Name three greenhouse gases.
- 26th February 2003A kettle transfers 360000 J of energy in 150 s. Calculate its power in watts.
- 27th February 2003Why does the national grid transmit electricity at a very high potential difference?
- 28th February 2003Why is the atomic model a good example of how scientific models change?