Daily Practice · GCSE Science
October 2000 - GCSE Science 5-a-day
Every GCSE Science sheet published in October 2000, with answers. Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
Every sheet in October 2000
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st October 2000Why does the rate of photosynthesis fall at very high temperatures?
- 2nd October 2000Give one piece of evidence that supports Darwin's theory of evolution by natural selection.
- 3rd October 2000Explain why large-scale deforestation increases the concentration of carbon dioxide in the atmosphere.
- 4th October 2000State the four stages considered in a life cycle assessment.
- 5th October 2000Why does simple molecular carbon dioxide have a much lower melting point than giant covalent silicon dioxide?
- 6th October 2000Define oxidation in terms of electrons.
- 7th October 2000State two units that the rate of a reaction can be measured in.
- 8th October 2000Name the two methods used to produce ethanol industrially.
- 9th October 2000Name the two gases produced by photosynthesis and the substance it consumes alongside carbon dioxide.
- 10th October 2000A 3 kg object is raised 2 m. Calculate the gravitational potential energy gained. (g = 9.8 N/kg)
- 11th October 2000Name the change of state when a liquid becomes a gas throughout the liquid, at its boiling point.
- 12th October 2000A 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.
- 13th October 2000State whether sound waves are transverse or longitudinal.
- 14th October 2000State the name of the component at the centre of a transformer's primary and secondary coils, and state its purpose.
- 15th October 2000A student views a red blood cell at a magnification of x2000. The image of the cell measures 20 mm across. Calculate the real width of the cell, giving your answer in micrometres (um).
- 16th October 2000State two functions of bile.
- 17th October 2000What is an antigen?
- 18th October 2000State why a reflex action is described as involuntary.
- 19th October 2000A student counts 3, 5, 4 and 8 dandelion plants in four separate 1 m^2 quadrats. Calculate the mean number of dandelions per quadrat.
- 20th October 2000State the two main steps used to produce potable water from a fresh water source.
- 21st October 2000State the charge on a calcium ion (Group 2).
- 22nd October 2000State two reasons why a percentage yield is less than 100 percent.
- 23rd October 2000State what is meant by the activation energy of a reaction.
- 24th October 2000State what happens to the boiling point of hydrocarbons as their chain length increases.
- 25th October 2000Explain why the baseline is drawn in pencil rather than ink.
- 26th October 2000Give one reason for taking the gradient from the line of best fit rather than from two data points.
- 27th October 2000State the equation linking potential difference, current and resistance.
- 28th October 2000Define half-life.
- 29th October 2000A skateboarder of mass 55 kg moving at 4 m/s collides with and grabs onto a stationary shopping trolley of mass 20 kg, and they move off together. Calculate their combined velocity immediately after the collision.
- 30th October 2000Describe the shape of the magnetic field produced around a long straight wire carrying a current.
- 31st October 2000State how the amount of red-shift is related to a galaxy's distance from Earth.