Daily Practice · GCSE Science
November 1980 5-a-day
Every sheet in November 1980
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st November 1980State one advantage of running known reference substances alongside an unknown sample on the same chromatogram, rather than only comparing to published Rf values.
- 2nd November 1980How is the uncertainty in a set of repeated readings usually estimated?
- 3rd November 1980Define electric current.
- 4th November 1980A source has a half-life of 5 days and an initial activity of 1600 Bq. What is its activity after 15 days?
- 5th November 1980State two factors that increase a driver's thinking distance.
- 6th November 1980Name a typical material used to make a permanent magnet, and a typical material used to make an induced (temporary) magnet.
- 7th November 1980State, in one sentence, what the Big Bang model proposes about the early universe.
- 8th November 1980Calculate the surface area to volume ratio of a cube of side 2 cm.
- 9th November 1980Which type of pathogen causes athlete's foot, a fungal skin infection?
- 10th November 1980A yeast culture respires without oxygen. Name the two products of this reaction, and name one industrial process that relies on it.
- 11th November 1980A man who is a known carrier of cystic fibrosis (Ff) has children with a woman who has been confirmed to carry no cystic fibrosis allele at all (FF). Explain why none of their children can have cystic fibrosis.
- 12th November 1980Give the resolution of a burette that can be read to the nearest half of a small division.
- 13th November 1980Why is an atom electrically neutral?
- 14th November 1980State the law of conservation of mass.
- 15th November 1980Concentrated sodium chloride solution (brine) is electrolysed using inert electrodes. State the products formed at the cathode and at the anode.
- 16th November 1980Explain why increasing temperature increases the rate of a reaction, referring to both the frequency and the energy of collisions.
- 17th November 1980Give one piece of evidence that a solid sample is impure, based on its melting behaviour.
- 18th November 1980Explain why carbon monoxide is dangerous even though it has no smell.
- 19th November 1980Why can no device be 100 percent efficient?
- 20th November 1980Why is melting described as a physical change?
- 21st November 1980A box has a driving force of 250 N forward and friction of 180 N backward. Calculate the resultant force, including its direction.
- 22nd November 1980Sound waves travel through a steel rail at approximately 5900 m/s. A sound wave sent along the rail has a frequency of 2950 Hz. Calculate its wavelength.
- 23rd November 1980State the eventual fate of a star with a much greater mass than the Sun, after it explodes as a supernova.
- 24th November 1980Convert 0.05 mm into micrometres.
- 25th November 1980State the function of the valves in the heart and in veins.
- 26th November 1980Explain why anaerobic respiration releases much less energy per glucose molecule than aerobic respiration.
- 27th November 1980Name the gland often called the body's master gland.
- 28th November 1980The Arctic fox has small, rounded ears compared with the desert fennec fox, which has very large ears. State whether this is a structural, behavioural or functional adaptation, and explain how it helps the Arctic fox survive.
- 29th November 1980State what is meant by sustainable development.
- 30th November 1980Write the formula of calcium chloride and explain the ratio.