Daily Practice · GCSE Science
September 1985 5-a-day
Every sheet in September 1985
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st September 1985Define mutation.
- 2nd September 1985Explain, in terms of electrons, why reactivity decreases going down Group 7.
- 3rd September 1985Give two observations when lithium is added to water.
- 4th September 1985State the value of the Avogadro constant and what it counts.
- 5th September 1985Explain, in terms of bonds, why breaking bonds is an endothermic process.
- 6th September 1985The forward reaction of a particular reversible reaction is exothermic. State whether the reverse reaction is exothermic or endothermic.
- 7th September 1985Write the ionic equation for the precipitation reaction between barium ions and sulfate ions.
- 8th September 1985Write the equation linking power, energy and time, and rearrange it for time.
- 9th September 1985In a series circuit, the current through one lamp is 0.30 A. State the current through a second lamp in the same circuit.
- 10th September 1985A gas is heated in a sealed rigid container. Explain what happens to the pressure.
- 11th September 1985State what the gradient of a distance-time graph represents.
- 12th September 1985Explain why ultraviolet, X-rays and gamma rays can be hazardous to human health, but radio waves are not.
- 13th September 1985Explain, in terms of forces, why a satellite in a stable orbit does not fall towards the Earth or fly off into space.
- 14th September 1985Define an undifferentiated cell.
- 15th September 1985Which tissue transports water and mineral ions from the roots?
- 16th September 1985Give three uses of the glucose produced in photosynthesis.
- 17th September 1985In 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.
- 18th September 1985A 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.
- 19th September 1985Explain why steel (an alloy of iron and carbon) is generally harder than pure iron.
- 20th September 1985Why do polymers have higher melting points than small molecules such as methane?
- 21st September 1985Complete: acid + metal carbonate gives ...
- 22nd September 1985State the four factors that can increase the rate of a chemical reaction.
- 23rd September 1985State what happens to the carbon-to-carbon double bond of an alkene monomer during addition polymerisation.
- 24th September 1985Describe, in terms of wavelength, the difference between the radiation the Earth receives from the Sun and the radiation it re-emits from its surface.
- 25th September 1985By what factor does kinetic energy increase if speed is doubled?
- 26th September 1985State what happens to the internal energy of a substance as it is heated, in terms of the kinetic and potential energy of its particles.
- 27th September 1985Define the term 'half-life' of a radioactive isotope.
- 28th September 1985Name the type of electromagnetic wave used to sterilise medical equipment.
- 29th September 1985A 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.
- 30th September 1985A microscope has a x10 eyepiece lens and a x20 objective lens. Calculate the total magnification.