Daily Practice · GCSE Science
May 1980 5-a-day
Every sheet in May 1980
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st May 1980Why does simple molecular carbon dioxide have a much lower melting point than giant covalent silicon dioxide?
- 2nd May 1980Define oxidation in terms of electrons.
- 3rd May 1980State two units that the rate of a reaction can be measured in.
- 4th May 1980State what happens to the carbon-to-carbon double bond of an alkene monomer during addition polymerisation.
- 5th May 1980Describe, in terms of wavelength, the difference between the radiation the Earth receives from the Sun and the radiation it re-emits from its surface.
- 6th May 1980A 3 kg object is raised 2 m. Calculate the gravitational potential energy gained. (g = 9.8 N/kg)
- 7th May 1980State what happens to the internal energy of a substance as it is heated, in terms of the kinetic and potential energy of its particles.
- 8th May 1980A 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.
- 9th May 1980Name the type of electromagnetic wave used to sterilise medical equipment.
- 10th May 1980A transformer has a primary current of 2.0 A and a primary voltage of 230 V. The secondary voltage is 460 V. Assuming the transformer is 100 percent efficient, calculate the secondary current.
- 11th May 1980A microscope has a x10 eyepiece lens and a x20 objective lens. Calculate the total magnification.
- 12th May 1980State two functions of bile.
- 13th May 1980What is an antigen?
- 14th May 1980Explain why reflex responses are faster than voluntary responses.
- 15th May 1980Define community, in ecological terms.
- 16th May 1980Explain why potable water is not the same as pure water.
- 17th May 1980Explain why sodium chloride conducts electricity when molten but not when solid.
- 18th May 1980State two reasons why a percentage yield is less than 100 percent.
- 19th May 1980State what is meant by the activation energy of a reaction.
- 20th May 1980Name the two industrial methods of cracking.
- 21st May 1980Explain why the baseline is drawn in pencil rather than ink.
- 22nd May 1980Give one reason for taking the gradient from the line of best fit rather than from two data points.
- 23rd May 1980State the equation linking potential difference, current and resistance.
- 24th May 1980Define half-life.
- 25th May 1980Explain, using Newton's Third Law, why a swimmer is able to push themselves forward by pushing backward against the water.
- 26th May 1980State what happens to the magnetic field around a straight current-carrying wire if the direction of the current is reversed.
- 27th May 1980State what red-shift shows about the motion of most distant galaxies.
- 28th May 1980Define osmosis.
- 29th May 1980Explain why a small number of healthy volunteers are given a very low dose of a new drug in the first stage of a clinical trial.
- 30th May 1980State the word equation for aerobic respiration.
- 31st May 1980State one ethical concern raised by embryo screening.