Daily Practice · GCSE Science
September 1989 5-a-day
Every sheet in September 1989
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st September 1989Explain, in terms of particle size, how reverse osmosis separates water from dissolved salt.
- 2nd September 1989Why can an ionic compound conduct electricity when molten or dissolved but not when solid?
- 3rd September 1989Explain why aluminium cannot be extracted from aluminium oxide by heating with carbon.
- 4th September 1989State the only substance produced when a hydrogen fuel cell reacts pure hydrogen with pure oxygen.
- 5th September 1989Name the catalyst used when an alkene reacts with hydrogen to form an alkane.
- 6th September 1989Name three greenhouse gases.
- 7th September 1989A kettle transfers 360000 J of energy in 150 s. Calculate its power in watts.
- 8th September 1989Give the colour and function of the earth wire.
- 9th September 1989What observation showed the nucleus is positively charged and very small?
- 10th September 1989A force of 40 N is applied 0.25 m from a pivot. Calculate the moment.
- 11th September 1989A rectangular coil carrying a current is placed in a magnetic field, with its two long sides parallel to each other. Explain why the coil rotates rather than moving in a straight line.
- 12th September 1989A student measures 24 cubic centimetres of gas in 3 minutes. Calculate the rate.
- 13th September 1989Name the plant tissue that transports water and dissolved minerals from the roots to the leaves.
- 14th September 1989Give one way of reducing the spread of malaria.
- 15th September 1989Define homeostasis.
- 16th September 1989Give one example of variation that is caused purely by the environment rather than by genes.
- 17th September 1989Explain, in terms of electrons, why reactivity decreases going down Group 7.
- 18th September 1989Why do elements in the same group have similar chemical properties?
- 19th September 1989Why is the amount of product directly proportional to the amount of limiting reactant?
- 20th September 1989Explain, in terms of bonds, why breaking bonds is an endothermic process.
- 21st September 1989In the Haber process, state the effect of removing some ammonia from the equilibrium mixture as it forms on the position of equilibrium.
- 22nd September 1989A solution forms a green precipitate with sodium hydroxide solution. Which ion is present?
- 23rd September 1989Give the equation for wave speed and its units.
- 24th September 1989In a series circuit, the current through one lamp is 0.30 A. State the current through a second lamp in the same circuit.
- 25th September 1989Why does reducing the volume of a gas increase the pressure even though the molecules do not speed up?
- 26th September 1989A runner completes a 400 m race in 52 s. Calculate her average speed, giving your answer to 3 significant figures.
- 27th September 1989Name the type of electromagnetic wave used by a television remote control.
- 28th September 1989Explain why a satellite moving in a stable circular orbit has a changing velocity even though its speed stays constant.
- 29th September 1989Give one risk of stem cell treatment.
- 30th September 1989Why does a potometer measure water uptake rather than transpiration directly?