Daily Practice · GCSE Science
September 1955 5-a-day
Every sheet in September 1955
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st September 1955Why does a food test for sugars need a water bath?
- 2nd September 1955Explain what is meant by a double blind trial.
- 3rd September 1955State the type of effector that produces a physical response by contracting.
- 4th September 1955Give one example of a biotic factor that could affect a population of rabbits.
- 5th September 1955Name two methods of desalinating seawater.
- 6th September 1955Name the giant covalent structure made of carbon in which each carbon atom is bonded to four others.
- 7th September 1955Give the formula for atom economy.
- 8th September 1955Explain, 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.
- 9th September 1955Balance the equation for the complete combustion of methane: CH4 + O2 -> CO2 + H2O
- 10th September 1955State one advantage of running known reference substances alongside an unknown sample on the same chromatogram, rather than only comparing to published Rf values.
- 11th September 1955How is the uncertainty in a set of repeated readings usually estimated?
- 12th September 1955Define electric current.
- 13th September 1955A source has a half-life of 5 days and an initial activity of 1600 Bq. What is its activity after 15 days?
- 14th September 1955State two factors that increase a driver's thinking distance.
- 15th September 1955Name a typical material used to make a permanent magnet, and a typical material used to make an induced (temporary) magnet.
- 16th September 1955State, in one sentence, what the Big Bang model proposes about the early universe.
- 17th September 1955Calculate the surface area to volume ratio of a cube of side 2 cm.
- 18th September 1955Describe how phagocytes destroy pathogens in the body.
- 19th September 1955A yeast culture respires without oxygen. Name the two products of this reaction, and name one industrial process that relies on it.
- 20th September 1955A 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.
- 21st September 1955Give the resolution of a burette that can be read to the nearest half of a small division.
- 22nd September 1955Why is an atom electrically neutral?
- 23rd September 1955State the law of conservation of mass.
- 24th September 1955Concentrated sodium chloride solution (brine) is electrolysed using inert electrodes. State the products formed at the cathode and at the anode.
- 25th September 1955Explain why increasing temperature increases the rate of a reaction, referring to both the frequency and the energy of collisions.
- 26th September 1955Give one piece of evidence that a solid sample is impure, based on its melting behaviour.
- 27th September 1955Explain why carbon monoxide is dangerous even though it has no smell.
- 28th September 1955Why can no device be 100 percent efficient?
- 29th September 1955Why is melting described as a physical change?
- 30th September 1955Calculate the weight of an object of mass 8.0 kg on Earth, where g = 9.8 N/kg.