Daily Practice · GCSE Science
June 1999 - GCSE Science 5-a-day
Every GCSE Science sheet published in June 1999, with answers. Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
Every sheet in June 1999
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st June 1999Why is graphite soft and slippery?
- 2nd June 1999Explain the difference between a strong acid and a concentrated acid.
- 3rd June 1999A reaction between calcium carbonate and hydrochloric acid produces 72 cm3 of carbon dioxide gas in 30 seconds. Calculate the mean rate of reaction.
- 4th June 1999Explain why carboxylic acids are described as 'weak acids'.
- 5th June 1999Name the two gases produced by photosynthesis and the substance it consumes alongside carbon dioxide.
- 6th June 1999Name four energy stores.
- 7th June 1999Name the change of state when a liquid becomes a gas throughout the liquid, at its boiling point.
- 8th June 1999State one source of natural background radiation and one source of artificial (man-made) background radiation.
- 9th June 1999Explain why ultraviolet radiation can be harmful to human skin.
- 10th June 1999State two ways of inducing a potential difference across a conductor using a magnetic field.
- 11th June 1999A student views a red blood cell at a magnification of x2000. The image of the cell measures 20 mm across. Calculate the real width of the cell, giving your answer in micrometres (um).
- 12th June 1999What is an enzyme?
- 13th June 1999Describe phagocytosis.
- 14th June 1999A ruler is released and falls 20 cm before being caught. Using distance = 0.5 x g x time^2 with g = 9.8 m/s^2, calculate the reaction time, to 3 significant figures.
- 15th June 1999Name the equipment used to measure the abundance of a small plant species within a sample area.
- 16th June 1999State the two main steps used to produce potable water from a fresh water source.
- 17th June 1999State the charge on a calcium ion (Group 2).
- 18th June 1999Give the formula for percentage yield.
- 19th June 1999A student reacts excess zinc powder with 25 cm3 of copper sulfate solution in a polystyrene cup. The starting temperature is 21.0 degrees C and the maximum temperature reached is 58.5 degrees C. Calculate the temperature change.
- 20th June 1999Define the term 'hydrocarbon'.
- 21st June 1999State two advantages of instrumental methods of analysis, such as GC-MS, compared with manual chemical tests.
- 22nd June 1999Distinguish repeatability from reproducibility.
- 23rd June 1999How does the resistance of a thermistor change as it gets hotter?
- 24th June 1999What is an alpha particle made of?
- 25th June 1999A shopping trolley has a mass of 25 kg. Calculate its weight, taking g = 9.8 N/kg.
- 26th June 1999A 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.
- 27th June 1999Explain 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.
- 28th June 1999Explain why a plant cell placed in pure water does not burst.
- 29th June 1999Name the vector that spreads the protist pathogen that causes malaria.
- 30th June 1999Explain, in terms of respiration, why a build-up of lactic acid causes muscle fatigue during vigorous exercise.