Daily Practice · GCSE Science
February 1992 5-a-day
Every sheet in February 1992
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st February 1992A student counts 19 pulse beats in 10 seconds immediately after running. Calculate her heart rate in beats per minute.
- 2nd February 1992State how many chromosomes are found in a normal human body cell, and how they are arranged.
- 3rd February 1992Why is the burette rinsed with the solution it is going to contain rather than with water?
- 4th February 1992State the relative mass and relative charge of a neutron.
- 5th February 1992Calculate the Mr of Ca(OH)2. (Ca = 40, O = 16, H = 1)
- 6th February 1992In the industrial extraction of aluminium, explain why the carbon anodes need to be replaced regularly.
- 7th February 1992State the condition, in terms of energy, that colliding particles must meet for a reaction to occur.
- 8th February 1992Which reagent is added, and in what colour change, to test for chlorine gas?
- 9th February 1992Explain how solid carbon particulates released by combustion can cause global dimming.
- 10th February 1992A lamp is supplied with 60 J and transfers 6 J as light. Calculate its efficiency as a percentage.
- 11th February 1992Define specific latent heat of fusion.
- 12th February 1992Calculate the weight of an object of mass 8.0 kg on Earth, where g = 9.8 N/kg.
- 13th February 1992A wave has a period of 0.005 s. Calculate its frequency.
- 14th February 1992State the difference between a natural satellite and an artificial satellite, and give one example of each.
- 15th February 1992Give the equation linking magnification, image size and real size.
- 16th February 1992Give one advantage and one disadvantage of a stent.
- 17th February 1992Name the gas that is released as a product of photosynthesis.
- 18th February 1992Name the hormone that causes the liver to convert stored glycogen back into glucose.
- 19th February 1992State what is meant by the term ecosystem.
- 20th February 1992Explain why potable water is not required to be chemically pure.
- 21st February 1992Describe metallic bonding.
- 22nd February 1992State the name given to a reaction in which a substance loses electrons.
- 23rd February 1992State whether breaking a chemical bond requires energy or releases energy.
- 24th February 1992State the type of reaction that occurs when bromine adds across the double bond of an alkene.
- 25th February 1992Give two processes that removed carbon dioxide from the early atmosphere.
- 26th February 1992Calculate the kinetic energy of a 2.0 kg trolley moving at 4.0 m/s.
- 27th February 1992Why does the national grid transmit electricity at a very high potential difference?
- 28th February 1992Why is the atomic model a good example of how scientific models change?
- 29th February 1992Explain why a rucksack with wide, padded straps is more comfortable to carry than one with thin straps, for the same load.