Daily Practice · GCSE Science
March 1981 5-a-day
Every sheet in March 1981
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st March 1981A current-carrying wire experiences a force of 1.2 N when placed at right angles to a magnetic field of flux density 0.40 T, carrying a current of 6.0 A. Calculate the length of wire in the field.
- 2nd March 1981Define the independent variable.
- 3rd March 1981State the type of large biological molecule that all enzymes are made from.
- 4th March 1981Name the type of pathogen that causes malaria.
- 5th March 1981State one difference between nervous and hormonal coordination.
- 6th March 1981State what is meant by a selection pressure.
- 7th March 1981A sample contains 90% of an isotope with mass number 10 and 10% of an isotope with mass number 11. Calculate the relative atomic mass, to 1 decimal place.
- 8th March 1981Why are the noble gases unreactive?
- 9th March 1981How many atoms are there in 0.5 mol of helium?
- 10th March 1981Using the values in the previous question, calculate the overall energy change for the reaction.
- 11th March 1981State Le Chatelier's principle in your own words.
- 12th March 1981Describe the test, and the positive result, for ammonium ions.
- 13th March 1981Convert 3.5 kJ into joules.
- 14th March 1981A resistor of resistance 15 ohm is connected to a 6.0 V supply. Calculate the current flowing through it. Use V = I x R.
- 15th March 1981How is the temperature of a gas related to the motion of its molecules?
- 16th March 1981On a velocity-time graph, what does the area between the line and the time axis represent?
- 17th March 1981State the speed of all electromagnetic waves travelling through a vacuum.
- 18th March 1981State the name of the force that keeps a satellite in orbit around the Earth.
- 19th March 1981How many pairs of chromosomes are there in a human body cell?
- 20th March 1981Where are most stomata found on a typical leaf, and why?
- 21st March 1981Name four limiting factors of photosynthesis.
- 22nd March 1981A plant grown in the shade is shorter than a genetically identical plant of the same species grown in full sunlight. State whether this difference is genetic variation, environmental variation, or both.
- 23rd March 1981State what is meant by the term biodiversity.
- 24th March 1981Give one reason a manufacturer's own life cycle assessment of its product might not be fully objective.
- 25th March 1981Give one use of nanoparticles and one associated risk.
- 26th March 1981Give the ionic equation for neutralisation.
- 27th March 1981State what is shown on a rate graph when the line for the volume of gas produced becomes horizontal (flat).
- 28th March 1981Name the small molecule typically released as a by-product during condensation polymerisation.
- 29th March 1981State two long-term stores of carbon that removed carbon dioxide from the early atmosphere.
- 30th March 1981State the equation for gravitational potential energy.
- 31st March 1981Calculate the energy needed to melt 0.50 kg of a substance with a specific latent heat of fusion of 210000 J/kg.