Daily Practice · GCSE Science
February 1985 5-a-day
Every sheet in February 1985
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st February 1985State one benefit of recycling metal rather than extracting new metal from its ore.
- 2nd February 1985Name the three types of strong chemical bonding.
- 3rd February 1985State two reasons why a percentage yield is less than 100 percent.
- 4th February 1985State what is meant by the activation energy of a reaction.
- 5th February 1985Define the term 'hydrocarbon'.
- 6th February 1985Explain why the baseline is drawn in pencil rather than ink.
- 7th February 1985Give one reason for taking the gradient from the line of best fit rather than from two data points.
- 8th February 1985State the equation linking potential difference, current and resistance.
- 9th February 1985Define half-life.
- 10th February 1985A shopping trolley has a mass of 25 kg. Calculate its weight, taking g = 9.8 N/kg.
- 11th February 1985A student wraps a coil of insulated wire around an iron nail and connects it to a battery. Name the device this creates, and state one way to increase its magnetic field strength.
- 12th February 1985Explain why red-shift observations support the idea that the universe is expanding, rather than Earth simply being at the centre of the universe with everything moving away from it.
- 13th February 1985Define osmosis.
- 14th February 1985State one way that pathogens can be spread from person to person.
- 15th February 1985Explain, in terms of respiration, why a build-up of lactic acid causes muscle fatigue during vigorous exercise.
- 16th February 1985A man has genotype XY. State his sex, and state which sex chromosomes are found in the sperm cells he produces.
- 17th February 1985A gas syringe collects 48 cubic centimetres of gas in 40 seconds. Calculate the mean rate.
- 18th February 1985Why do isotopes of an element react in the same way?
- 19th February 1985Calculate the Mr of calcium carbonate, CaCO3. (Ca = 40, C = 12, O = 16)
- 20th February 1985In the industrial extraction of aluminium, explain why the aluminium oxide is dissolved in molten cryolite rather than melted on its own.
- 21st February 1985Explain why increasing the surface area of a solid reactant increases the rate of a reaction.
- 22nd February 1985State the reagent added, and the result, that shows a white solid contains sulfate ions.
- 23rd February 1985State the two products of the complete combustion of a hydrocarbon fuel.
- 24th February 1985State one way to increase the efficiency of a motor.
- 25th February 1985Why is the density of a gas much lower than that of the same substance as a liquid?
- 26th February 1985State whether friction is a contact force or a non-contact force.
- 27th February 1985A wave has a frequency of 50 Hz. Calculate its period.
- 28th February 1985Explain, in terms of forces, why an orbiting satellite does not travel off in a straight line.