Daily Practice · GCSE Science
October 1978 5-a-day
Every sheet in October 1978
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st October 1978Why does the rate of photosynthesis fall at very high temperatures?
- 2nd October 1978State one difference between selective breeding and genetic engineering.
- 3rd October 1978Explain why large-scale deforestation increases the concentration of carbon dioxide in the atmosphere.
- 4th October 1978State the four stages considered in a life cycle assessment.
- 5th October 1978Why does simple molecular carbon dioxide have a much lower melting point than giant covalent silicon dioxide?
- 6th October 1978Define oxidation in terms of electrons.
- 7th October 1978State two units that the rate of a reaction can be measured in.
- 8th October 1978State the functional group found in all carboxylic acids.
- 9th October 1978Explain, in one sentence, why the oceans were able to form only after the early Earth had cooled.
- 10th October 1978A 3 kg object is raised 2 m. Calculate the gravitational potential energy gained. (g = 9.8 N/kg)
- 11th October 1978A 1.5 kg block of iron is heated from 18 degrees C to 98 degrees C. The specific heat capacity of iron is 450 J/(kg degrees C). Calculate the change in thermal energy.
- 12th October 1978A GM tube detects a count rate of 240 counts per minute from a source. After 15 days the count rate has fallen to 30 counts per minute. Show that this data is consistent with a half-life of 5 days.
- 13th October 1978State the speed at which all electromagnetic waves travel through a vacuum.
- 14th October 1978A transformer has 500 turns on its primary coil and 2500 turns on its secondary coil. State, with a reason, whether this is a step-up or a step-down transformer.
- 15th October 1978State one structure found in a bacterial cell but not in an animal cell.
- 16th October 1978State two functions of bile.
- 17th October 1978What is an antigen?
- 18th October 1978Name the two parts of the central nervous system (CNS).
- 19th October 1978Name the group of organisms that break down dead plant and animal matter, returning mineral ions to the soil.
- 20th October 1978Define a finite resource, giving one example.
- 21st October 1978State one reason why simple covalent substances such as chlorine have low melting points.
- 22nd October 1978State two reasons why a percentage yield is less than 100 percent.
- 23rd October 1978State what is meant by the activation energy of a reaction.
- 24th October 1978Hexadecane (C16H34) is cracked to produce dodecane (C12H26) and one other product. Calculate the molecular formula of the other product.
- 25th October 1978Explain why the baseline is drawn in pencil rather than ink.
- 26th October 1978Give one reason for taking the gradient from the line of best fit rather than from two data points.
- 27th October 1978State the equation linking potential difference, current and resistance.
- 28th October 1978Define half-life.
- 29th October 1978A resultant force of 60 N acts on a wheelbarrow of mass 15 kg. Calculate its acceleration.
- 30th October 1978State the difference between a permanent magnet and an induced magnet.
- 31st October 1978State whether a galaxy moving towards Earth would show a red-shift or a blue-shift in its light.