Daily Practice · GCSE Science
April 1998 - GCSE Science 5-a-day
Every sheet in April 1998
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 1998State the value of the Avogadro constant and what it counts.
- 2nd April 1998Give one everyday example of an endothermic process.
- 3rd April 1998The forward reaction of a particular reversible reaction is exothermic. State whether the reverse reaction is exothermic or endothermic.
- 4th April 1998Write the ionic equation for the precipitation reaction between barium ions and sulfate ions.
- 5th April 1998Write the equation linking power, energy and time, and rearrange it for time.
- 6th April 1998A current of 2.0 A flows through a resistor for 30 s. Calculate the charge that flows. Use Q = I x t.
- 7th April 1998A gas is heated in a sealed rigid container. Explain what happens to the pressure.
- 8th April 1998State what the gradient of a distance-time graph represents.
- 9th April 1998Explain why ultraviolet, X-rays and gamma rays can be hazardous to human health, but radio waves are not.
- 10th April 1998Explain, in terms of forces, why a satellite in a stable orbit does not fall towards the Earth or fly off into space.
- 11th April 1998Define an undifferentiated cell.
- 12th April 1998Which tissue transports water and mineral ions from the roots?
- 13th April 1998Give three uses of the glucose produced in photosynthesis.
- 14th April 1998In pea plants, the allele for tall stems (T) is dominant over the allele for short stems (t). A homozygous tall plant (TT) is crossed with a homozygous short plant (tt). State the genotype and phenotype of all the offspring.
- 15th April 1998A peat bog covered an area of 850 hectares in 2015. By 2025, drainage for farmland had reduced the peat bog to 680 hectares. Calculate the percentage decrease in the area of the peat bog.
- 16th April 1998Explain why steel (an alloy of iron and carbon) is generally harder than pure iron.
- 17th April 1998Why do polymers have higher melting points than small molecules such as methane?
- 18th April 1998Complete: acid + metal carbonate gives ...
- 19th April 1998State the four factors that can increase the rate of a chemical reaction.
- 20th April 1998State what happens to the carbon-to-carbon double bond of an alkene monomer during addition polymerisation.
- 21st April 1998Explain, in terms of gas molecules, why methane and water vapour, as well as carbon dioxide, are described as greenhouse gases.
- 22nd April 1998By what factor does kinetic energy increase if speed is doubled?
- 23rd April 1998A block has a volume of 50 cm^3 and a mass of 135 g. Calculate its density.
- 24th April 1998Define the term 'half-life' of a radioactive isotope.
- 25th April 1998Name the type of electromagnetic wave used to sterilise medical equipment.
- 26th April 1998A transformer has a primary current of 2.0 A and a primary voltage of 230 V. The secondary voltage is 460 V. Assuming the transformer is 100 percent efficient, calculate the secondary current.
- 27th April 1998A cube-shaped model cell has sides of length 3 cm. Calculate the surface area to volume ratio of the cube. Give your answer in the form n : 1.
- 28th April 1998Describe the positive result of the Biuret test.
- 29th April 1998What is tested during preclinical testing?
- 30th April 1998Explain why reflex responses are faster than voluntary responses.