Daily Practice · GCSE Science
August 1993 - GCSE Science 5-a-day
Every sheet in August 1993
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st August 1993State the four factors that can increase the rate of a chemical reaction.
- 2nd August 1993Name the two methods used to produce ethanol industrially.
- 3rd August 1993Explain, in one sentence, why the oceans were able to form only after the early Earth had cooled.
- 4th August 1993By what factor does kinetic energy increase if speed is doubled?
- 5th August 1993A 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.
- 6th August 1993Define the term 'half-life' of a radioactive isotope.
- 7th August 1993State whether sound waves are transverse or longitudinal.
- 8th August 1993State the name of the component at the centre of a transformer's primary and secondary coils, and state its purpose.
- 9th August 1993State one structure found in a bacterial cell but not in an animal cell.
- 10th August 1993Describe the positive result of the Biuret test.
- 11th August 1993What is tested during preclinical testing?
- 12th August 1993State why a reflex action is described as involuntary.
- 13th August 1993A student counts 3, 5, 4 and 8 dandelion plants in four separate 1 m^2 quadrats. Calculate the mean number of dandelions per quadrat.
- 14th August 1993Define a finite resource, giving one example.
- 15th August 1993State one reason why simple covalent substances such as chlorine have low melting points.
- 16th August 1993Why do companies prefer reactions with a high atom economy?
- 17th August 1993On a reaction profile diagram, the reactants are drawn at a higher energy level than the products. State whether the reaction is exothermic or endothermic.
- 18th August 1993State what happens to the boiling point of hydrocarbons as their chain length increases.
- 19th August 1993Explain why the solvent level in the container must be below the pencil baseline.
- 20th August 1993In the specific heat capacity practical, why is the block insulated?
- 21st August 1993Describe the current-potential difference graph for a filament lamp.
- 22nd August 1993State the difference between irradiation and contamination.
- 23rd August 1993A skateboarder of mass 55 kg moving at 4 m/s collides with and grabs onto a stationary shopping trolley of mass 20 kg, and they move off together. Calculate their combined velocity immediately after the collision.
- 24th August 1993Describe the shape of the magnetic field produced around a long straight wire carrying a current.
- 25th August 1993State how the amount of red-shift is related to a galaxy's distance from Earth.
- 26th August 1993Name the process that moves substances against a concentration gradient.
- 27th August 1993A student measures the mean diameter of a zone of inhibition as 12 mm. Calculate its radius.
- 28th August 1993State the word equation for anaerobic respiration in human muscle cells.
- 29th August 1993State whether cystic fibrosis is caused by a dominant or a recessive allele.
- 30th August 1993Why is the burette rinsed with the solution it is going to contain rather than with water?
- 31st August 1993State the relative mass and relative charge of a neutron.