Daily Practice · GCSE Science
August 2008 - GCSE Science 5-a-day
Every GCSE Science sheet published in August 2008, with answers. Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
Every sheet in August 2008
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st August 2008A solution forms a green precipitate with sodium hydroxide solution. Which ion is present?
- 2nd August 2008Give the equation for wave speed and its units.
- 3rd August 2008In a series circuit, the current through one lamp is 0.30 A. State the current through a second lamp in the same circuit.
- 4th August 2008Why does reducing the volume of a gas increase the pressure even though the molecules do not speed up?
- 5th August 2008Define the term 'vector quantity' and give one example.
- 6th August 2008Name the type of electromagnetic wave used to treat cancer by killing cells in a tumour, and state which part of the atom emits it.
- 7th August 2008State one difference between a moon and an artificial satellite.
- 8th August 2008Give one risk of stem cell treatment.
- 9th August 2008Why does a potometer measure water uptake rather than transpiration directly?
- 10th August 2008Why does the rate of photosynthesis fall at very high temperatures?
- 11th August 2008Define phenotype.
- 12th August 2008Explain why large-scale deforestation increases the concentration of carbon dioxide in the atmosphere.
- 13th August 2008State the four stages considered in a life cycle assessment.
- 14th August 2008Why does simple molecular carbon dioxide have a much lower melting point than giant covalent silicon dioxide?
- 15th August 2008Define oxidation in terms of electrons.
- 16th August 2008State two units that the rate of a reaction can be measured in.
- 17th August 2008Name the type of biological molecule formed when amino acid monomers join together by condensation polymerisation.
- 18th August 2008Describe, in terms of wavelength, the difference between the radiation the Earth receives from the Sun and the radiation it re-emits from its surface.
- 19th August 2008A 3 kg object is raised 2 m. Calculate the gravitational potential energy gained. (g = 9.8 N/kg)
- 20th August 2008State what happens to the internal energy of a substance as it is heated, in terms of the kinetic and potential energy of its particles.
- 21st August 2008A 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.
- 22nd August 2008A radio wave has a wavelength of 3 m. Calculate its frequency, given that all electromagnetic waves travel at 3 x 10^8 m/s in a vacuum.
- 23rd August 2008Explain why electricity is transmitted through the National Grid at a very high voltage rather than at the voltage used in homes.
- 24th August 2008A microscope has a x10 eyepiece lens and a x20 objective lens. Calculate the total magnification.
- 25th August 2008State two functions of bile.
- 26th August 2008What is an antigen?
- 27th August 2008Name the chemical released at a synapse that carries the signal across the gap.
- 28th August 2008Explain why deforestation to create land for cattle grazing can reduce biodiversity.
- 29th August 2008Explain why potable water is not the same as pure water.
- 30th August 2008Explain why sodium chloride conducts electricity when molten but not when solid.
- 31st August 2008State two reasons why a percentage yield is less than 100 percent.