Daily Practice · GCSE Science
September 1998 - GCSE Science 5-a-day
Every sheet in September 1998
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st September 1998Calculate the current drawn by a 1150 W kettle on a 230 V supply.
- 2nd September 1998State the approximate radius of a nucleus compared with the radius of an atom.
- 3rd September 1998A force of 40 N is applied 0.25 m from a pivot. Calculate the moment.
- 4th September 1998A 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.
- 5th September 1998State the difference between resolution and accuracy.
- 6th September 1998State the type of large biological molecule that all enzymes are made from.
- 7th September 1998How do bacteria make a person feel ill?
- 8th September 1998Define homeostasis.
- 9th September 1998Give one example of variation that is caused purely by the environment rather than by genes.
- 10th September 1998A sample contains 90% of an isotope with mass number 10 and 10% of an isotope with mass number 11. Calculate the relative atomic mass, to 1 decimal place.
- 11th September 1998On what property are elements ordered in the modern periodic table?
- 12th September 1998In the equation 2H2 + O2 gives 2H2O, how many moles of water are formed from 3 mol of hydrogen?
- 13th September 1998Using the values in the previous question, calculate the overall energy change for the reaction.
- 14th September 1998In the Haber process, state the effect of removing some ammonia from the equilibrium mixture as it forms on the position of equilibrium.
- 15th September 1998Why must dilute nitric acid be added before silver nitrate solution when testing for a halide ion?
- 16th September 1998State the equation for work done.
- 17th September 1998A resistor of resistance 15 ohm is connected to a 6.0 V supply. Calculate the current flowing through it. Use V = I x R.
- 18th September 1998State the relationship between pressure and volume for a fixed mass of gas at constant temperature.
- 19th September 1998A runner completes a 400 m race in 52 s. Calculate her average speed, giving your answer to 3 significant figures.
- 20th September 1998Name the type of electromagnetic wave used by a television remote control.
- 21st September 1998Explain why a satellite moving in a stable circular orbit has a changing velocity even though its speed stays constant.
- 22nd September 1998Where in a plant are stem cells found?
- 23rd September 1998Name the process by which dissolved sugars are transported in the phloem.
- 24th September 1998Why is photosynthesis described as endothermic?
- 25th September 1998Explain, using the idea of natural selection, why a population of insects can become resistant to a pesticide over time.
- 26th September 1998State one human activity that reduces the amount of land available for other organisms.
- 27th September 1998State the two substances that must both be present for iron to rust.
- 28th September 1998State the size range of a nanoparticle.
- 29th September 1998Why is aluminium extracted by electrolysis rather than by reduction with carbon?
- 30th September 1998Explain, using collision theory, why increasing the concentration of a reactant in solution increases the rate of a reaction.