Daily Practice · GCSE Science
January 2012 - GCSE Science 5-a-day
Every GCSE Science sheet published in January 2012, with answers. Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
Every sheet in January 2012
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st January 2012Name four energy stores.
- 2nd January 2012State the correct SI unit for density.
- 3rd January 2012State one source of natural background radiation and one source of artificial (man-made) background radiation.
- 4th January 2012Explain why ultraviolet radiation can be harmful to human skin.
- 5th January 2012State two ways of inducing a potential difference across a conductor using a magnetic field.
- 6th January 2012Convert 0.02 mm into micrometres (um).
- 7th January 2012What is an enzyme?
- 8th January 2012Describe phagocytosis.
- 9th January 2012A 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.
- 10th January 2012Name the equipment used to measure the abundance of a small plant species within a sample area.
- 11th January 2012State one benefit of recycling metal rather than extracting new metal from its ore.
- 12th January 2012Name the three types of strong chemical bonding.
- 13th January 2012Give the formula for percentage yield.
- 14th January 2012A 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.
- 15th January 2012Define the term 'hydrocarbon'.
- 16th January 2012State two advantages of instrumental methods of analysis, such as GC-MS, compared with manual chemical tests.
- 17th January 2012Distinguish repeatability from reproducibility.
- 18th January 2012How does the resistance of a thermistor change as it gets hotter?
- 19th January 2012What is an alpha particle made of?
- 20th January 2012A shopping trolley has a mass of 25 kg. Calculate its weight, taking g = 9.8 N/kg.
- 21st January 2012A 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.
- 22nd January 2012Explain 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.
- 23rd January 2012Explain why a plant cell placed in pure water does not burst.
- 24th January 2012State one way that pathogens can be spread from person to person.
- 25th January 2012Explain, in terms of respiration, why a build-up of lactic acid causes muscle fatigue during vigorous exercise.
- 26th January 2012A man has genotype XY. State his sex, and state which sex chromosomes are found in the sperm cells he produces.
- 27th January 2012In the rate experiment where a cross disappears, why is the result subjective?
- 28th January 2012An atom has an atomic number of 17 and a mass number of 37. How many neutrons does it have?
- 29th January 2012Calculate the number of moles in 20 g of calcium carbonate. (Mr = 100)
- 30th January 2012In the industrial extraction of aluminium, explain why the aluminium oxide is dissolved in molten cryolite rather than melted on its own.
- 31st January 2012Explain why increasing the surface area of a solid reactant increases the rate of a reaction.