Daily Practice · GCSE Science
July 2009 - GCSE Science 5-a-day
Every GCSE Science sheet published in July 2009, with answers. Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
Every sheet in July 2009
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st July 2009Explain why a satellite moving in a stable circular orbit has a changing velocity even though its speed stays constant.
- 2nd July 2009How many pairs of chromosomes are there in a human body cell?
- 3rd July 2009Where are most stomata found on a typical leaf, and why?
- 4th July 2009Name four limiting factors of photosynthesis.
- 5th July 2009Explain, using the idea of natural selection, why a population of insects can become resistant to a pesticide over time.
- 6th July 2009State what is meant by the term biodiversity.
- 7th July 2009Give one reason a manufacturer's own life cycle assessment of its product might not be fully objective.
- 8th July 2009Give one use of nanoparticles and one associated risk.
- 9th July 2009Give the ionic equation for neutralisation.
- 10th July 2009State what is shown on a rate graph when the line for the volume of gas produced becomes horizontal (flat).
- 11th July 2009Name the carboxylic acid produced when ethanol is oxidised.
- 12th July 2009State two long-term stores of carbon that removed carbon dioxide from the early atmosphere.
- 13th July 2009State the equation for gravitational potential energy.
- 14th July 2009Calculate the energy needed to melt 0.50 kg of a substance with a specific latent heat of fusion of 210000 J/kg.
- 15th July 2009Radium-226 (atomic number 88) decays by alpha emission. State the atomic number of the nucleus formed.
- 16th July 2009Define the term 'wavelength' of a wave.
- 17th July 2009State the difference between an alternator and a dynamo.
- 18th July 2009Name the structure in a plant cell that controls the substances entering and leaving the cell.
- 19th July 2009Explain what happens to an enzyme above its optimum temperature.
- 20th July 2009Name three non-specific defences of the human body.
- 21st July 2009State the type of effector that produces a physical response by contracting.
- 22nd July 2009Give one example of a biotic factor that could affect a population of rabbits.
- 23rd July 2009Name two methods of desalinating seawater.
- 24th July 2009Name the giant covalent structure made of carbon in which each carbon atom is bonded to four others.
- 25th July 2009Convert a concentration of 0.20 moles per cubic decimetre of NaOH into grams per cubic decimetre. (Mr = 40)
- 26th July 2009State the energy transfer that occurs during an exothermic reaction.
- 27th July 2009Balance the equation for the complete combustion of methane: CH4 + O2 -> CO2 + H2O
- 28th July 2009In a chromatography experiment, a dye spot travels 4.5 cm and the solvent front travels 6.0 cm. Calculate its Rf value.
- 29th July 2009Define the resolution of a measuring instrument.
- 30th July 2009Two 4 ohm resistors are connected in series. Calculate the total resistance.
- 31st July 2009Which type of radiation is stopped by a sheet of paper?