Daily Practice · GCSE Science
September 1979 5-a-day
Every sheet in September 1979
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st September 1979Explain why carboxylic acids are described as 'weak acids'.
- 2nd September 1979Explain why the natural greenhouse effect is necessary for life on Earth, rather than being a purely harmful process.
- 3rd September 1979State the equation for gravitational potential energy.
- 4th September 1979State the correct SI unit for density.
- 5th September 1979Radium-226 (atomic number 88) decays by alpha emission. State the atomic number of the nucleus formed.
- 6th September 1979Explain why ultraviolet radiation can be harmful to human skin.
- 7th September 1979State two ways of inducing a potential difference across a conductor using a magnetic field.
- 8th September 1979Convert 0.02 mm into micrometres (um).
- 9th September 1979Explain what happens to an enzyme above its optimum temperature.
- 10th September 1979Name three non-specific defences of the human body.
- 11th September 1979A ruler is released and falls 20 cm before being caught. Using distance = 0.5 x g x time^2 with g = 9.8 m/s^2, calculate the reaction time, to 3 significant figures.
- 12th September 1979Name the equipment used to measure the abundance of a small plant species within a sample area.
- 13th September 1979State one benefit of recycling metal rather than extracting new metal from its ore.
- 14th September 1979Name the three types of strong chemical bonding.
- 15th September 1979Convert a concentration of 0.20 moles per cubic decimetre of NaOH into grams per cubic decimetre. (Mr = 40)
- 16th September 1979State the energy transfer that occurs during an exothermic reaction.
- 17th September 1979Define the term 'hydrocarbon'.
- 18th September 1979In a chromatography experiment, a dye spot travels 4.5 cm and the solvent front travels 6.0 cm. Calculate its Rf value.
- 19th September 1979Define the resolution of a measuring instrument.
- 20th September 1979Two 4 ohm resistors are connected in series. Calculate the total resistance.
- 21st September 1979Which type of radiation is stopped by a sheet of paper?
- 22nd September 1979A shopping trolley has a mass of 25 kg. Calculate its weight, taking g = 9.8 N/kg.
- 23rd September 1979A student wraps a coil of insulated wire around an iron nail and connects it to a battery. Name the device this creates, and state one way to increase its magnetic field strength.
- 24th September 1979Explain why red-shift observations support the idea that the universe is expanding, rather than Earth simply being at the centre of the universe with everything moving away from it.
- 25th September 1979Why does active transport require energy?
- 26th September 1979State one way that pathogens can be spread from person to person.
- 27th September 1979Explain, in terms of respiration, why a build-up of lactic acid causes muscle fatigue during vigorous exercise.
- 28th September 1979A man has genotype XY. State his sex, and state which sex chromosomes are found in the sperm cells he produces.
- 29th September 1979Name one way to make a rate of reaction experiment more valid rather than simply more precise.
- 30th September 1979Define an isotope.