Daily Practice · GCSE Science
July 1993 - GCSE Science 5-a-day
Every sheet in July 1993
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st July 1993Give two processes that removed carbon dioxide from the early atmosphere.
- 2nd July 1993Calculate the kinetic energy of a 2.0 kg trolley moving at 4.0 m/s.
- 3rd July 1993Give the equation linking energy transferred, charge flow and potential difference.
- 4th July 1993Who provided the evidence for the existence of the neutron, and roughly when relative to the nuclear model?
- 5th July 1993State the equation that links pressure, force and area.
- 6th July 1993In a simple d.c. electric motor, state the name and function of the component that reverses the current in the coil every half turn.
- 7th July 1993Why does taking repeat readings and calculating a mean improve the data?
- 8th July 1993Explain why the rate of an enzyme-controlled reaction decreases sharply above the enzyme's optimum temperature.
- 9th July 1993State two ways measles is prevented from spreading.
- 10th July 1993Name the gland that monitors and controls blood glucose concentration.
- 11th July 1993Explain why genetic engineering can introduce a new characteristic in a single generation, while selective breeding cannot.
- 12th July 1993Write the electronic structure of an atom with 12 electrons.
- 13th July 1993Give two observations when lithium is added to water.
- 14th July 1993State the value of the Avogadro constant and what it counts.
- 15th July 1993A reaction profile shows the reactants at 220 kJ and the products at 340 kJ. State whether the reaction is exothermic or endothermic.
- 16th July 1993State the two named reactants used in the Haber process.
- 17th July 1993Write the ionic equation for the precipitation reaction between barium ions and sulfate ions.
- 18th July 1993Write the equation linking power, energy and time, and rearrange it for time.
- 19th July 1993State the UK mains supply frequency and typical potential difference.
- 20th July 1993A gas is heated in a sealed rigid container. Explain what happens to the pressure.
- 21st July 1993A ball decelerates uniformly from 18 m/s to 0 m/s over a distance of 2.7 m while being caught. Using (final velocity)^2 = (initial velocity)^2 + 2 x acceleration x distance, calculate its deceleration.
- 22nd July 1993An X-ray has a wavelength of 1 x 10^-10 m. Calculate its frequency (speed of light = 3 x 10^8 m/s).
- 23rd July 1993A satellite in a stable, small-radius, close orbit around the Earth is compared with a satellite in a stable, large-radius, distant orbit. State which of the two satellites has the greater orbital speed.
- 24th July 1993Define an undifferentiated cell.
- 25th July 1993Which tissue transports water and mineral ions from the roots?
- 26th July 1993Give three uses of the glucose produced in photosynthesis.
- 27th July 1993Give one piece of evidence that supports Darwin's theory of evolution by natural selection.
- 28th July 1993A 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.
- 29th July 1993Explain why steel (an alloy of iron and carbon) is generally harder than pure iron.
- 30th July 1993Why do polymers have higher melting points than small molecules such as methane?
- 31st July 1993Complete: acid + metal carbonate gives ...