Daily Practice · GCSE Science
April 1992 5-a-day
Every sheet in April 1992
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 1992Radium-226 (atomic number 88) decays by alpha emission. State the atomic number of the nucleus formed.
- 2nd April 1992Explain why ultraviolet radiation can be harmful to human skin.
- 3rd April 1992State two ways of inducing a potential difference across a conductor using a magnetic field.
- 4th April 1992State one structure found in a bacterial cell but not in an animal cell.
- 5th April 1992Explain what happens to an enzyme above its optimum temperature.
- 6th April 1992Name three non-specific defences of the human body.
- 7th April 1992A 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.
- 8th April 1992Name the equipment used to measure the abundance of a small plant species within a sample area.
- 9th April 1992Define a finite resource, giving one example.
- 10th April 1992State one reason why simple covalent substances such as chlorine have low melting points.
- 11th April 1992Convert a concentration of 0.20 moles per cubic decimetre of NaOH into grams per cubic decimetre. (Mr = 40)
- 12th April 1992State the energy transfer that occurs during an exothermic reaction.
- 13th April 1992Define the term 'hydrocarbon'.
- 14th April 1992In a chromatography experiment, a dye spot travels 4.5 cm and the solvent front travels 6.0 cm. Calculate its Rf value.
- 15th April 1992Define the resolution of a measuring instrument.
- 16th April 1992Two 4 ohm resistors are connected in series. Calculate the total resistance.
- 17th April 1992Which type of radiation is stopped by a sheet of paper?
- 18th April 1992A shopping trolley has a mass of 25 kg. Calculate its weight, taking g = 9.8 N/kg.
- 19th April 1992A 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.
- 20th April 1992Explain 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.
- 21st April 1992Why does active transport require energy?
- 22nd April 1992A student measures the mean diameter of a zone of inhibition as 12 mm. Calculate its radius.
- 23rd April 1992Explain, in terms of respiration, why a build-up of lactic acid causes muscle fatigue during vigorous exercise.
- 24th April 1992A man has genotype XY. State his sex, and state which sex chromosomes are found in the sperm cells he produces.
- 25th April 1992Name one way to make a rate of reaction experiment more valid rather than simply more precise.
- 26th April 1992Define an isotope.
- 27th April 1992A sealed flask containing 12.0 g of reactants is shaken and a reaction occurs. What is the total mass afterwards?
- 28th April 1992In the industrial extraction of aluminium, explain why the aluminium oxide is dissolved in molten cryolite rather than melted on its own.
- 29th April 1992Explain why increasing the surface area of a solid reactant increases the rate of a reaction.
- 30th April 1992State the difference between a pure substance and a formulation.