Daily Practice · GCSE Science
February 1993 5-a-day
Every sheet in February 1993
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st February 1993State whether the combustion of methane is exothermic or endothermic.
- 2nd February 1993State the effect of increasing the temperature on the position of equilibrium of a reaction whose forward reaction is exothermic.
- 3rd February 1993State the flame test colour for sodium ions.
- 4th February 1993Calculate the gravitational potential energy gained by a 60 kg person climbing 5 m. (g = 9.8 N/kg)
- 5th February 1993Two resistors are connected in parallel across a 12 V battery. State the potential difference across each resistor.
- 6th February 1993A gas at 200 kPa occupies 3.0 cubic metres. It is compressed to 1.5 cubic metres at constant temperature. Calculate the new pressure.
- 7th February 1993A car's velocity increases from 8 m/s to 20 m/s over 4 seconds. Calculate its acceleration.
- 8th February 1993State one medical use of X-rays and one safety precaution taken when X-rays are used in a hospital.
- 9th February 1993State two uses of artificial satellites.
- 10th February 1993State three functions of mitosis.
- 11th February 1993What happens to guard cells when a plant is short of water?
- 12th February 1993Write the word equation for photosynthesis.
- 13th February 1993State one difference between selective breeding and genetic engineering.
- 14th February 1993State one method used to try to maintain biodiversity.
- 15th February 1993Explain, using the reactivity series, why attaching blocks of zinc to the hull of a steel ship helps prevent the steel from rusting.
- 16th February 1993Why is graphite soft and slippery?
- 17th February 1993Explain the difference between a strong acid and a concentrated acid.
- 18th February 1993A reaction between calcium carbonate and hydrochloric acid produces 72 cm3 of carbon dioxide gas in 30 seconds. Calculate the mean rate of reaction.
- 19th February 1993State the functional group found in all carboxylic acids.
- 20th February 1993Explain why the natural greenhouse effect is necessary for life on Earth, rather than being a purely harmful process.
- 21st February 1993Name four energy stores.
- 22nd February 1993State the correct SI unit for density.
- 23rd February 1993State one source of natural background radiation and one source of artificial (man-made) background radiation.
- 24th February 1993State the speed at which all electromagnetic waves travel through a vacuum.
- 25th February 1993A transformer has 500 turns on its primary coil and 2500 turns on its secondary coil. State, with a reason, whether this is a step-up or a step-down transformer.
- 26th February 1993Convert 0.02 mm into micrometres (um).
- 27th February 1993What is an enzyme?
- 28th February 1993Describe phagocytosis.