Daily Practice · GCSE Science
April 2012 - GCSE Science 5-a-day
Every GCSE Science sheet published in April 2012, with answers. Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
Every sheet in April 2012
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 2012Explain why deforestation to create land for cattle grazing can reduce biodiversity.
- 2nd April 2012Name two methods of desalinating seawater.
- 3rd April 2012Name the giant covalent structure made of carbon in which each carbon atom is bonded to four others.
- 4th April 2012Give the formula for atom economy.
- 5th April 2012Explain, in terms of the reaction pathway, why adding a catalyst increases the rate of a reaction without changing the overall energy change of the reaction.
- 6th April 2012State two products, other than water, that can be formed during the incomplete combustion of a hydrocarbon.
- 7th April 2012State one advantage of running known reference substances alongside an unknown sample on the same chromatogram, rather than only comparing to published Rf values.
- 8th April 2012How is the uncertainty in a set of repeated readings usually estimated?
- 9th April 2012Define electric current.
- 10th April 2012A source has a half-life of 5 days and an initial activity of 1600 Bq. What is its activity after 15 days?
- 11th April 2012Explain why a larger vehicle mass increases braking distance.
- 12th April 2012State the type of force that always acts between an induced magnet and the magnet that induced it.
- 13th April 2012Name the model of the origin of the universe that is supported by red-shift observations.
- 14th April 2012Calculate the surface area to volume ratio of a cube of side 2 cm.
- 15th April 2012Describe how phagocytes destroy pathogens in the body.
- 16th April 2012Define oxygen debt.
- 17th April 2012Explain one benefit of the Human Genome Project.
- 18th April 2012Give the resolution of a burette that can be read to the nearest half of a small division.
- 19th April 2012Why is an atom electrically neutral?
- 20th April 2012State the law of conservation of mass.
- 21st April 2012Explain why solid sodium chloride does not conduct electricity, but molten sodium chloride does.
- 22nd April 2012In the gas-volume required practical measuring how concentration affects rate, state one variable that should be controlled.
- 23rd April 2012Give one piece of evidence that a solid sample is impure, based on its melting behaviour.
- 24th April 2012Explain why carbon monoxide is dangerous even though it has no smell.
- 25th April 2012Why can no device be 100 percent efficient?
- 26th April 2012Why is melting described as a physical change?
- 27th April 2012Calculate the weight of an object of mass 8.0 kg on Earth, where g = 9.8 N/kg.
- 28th April 2012A wave travels from air into glass and slows down. State what happens to its direction, and explain why in terms of wavelength.
- 29th April 2012State what a nebula is, and explain its role in the life cycle of a star.
- 30th April 2012Convert 0.05 mm into micrometres.