Daily Practice · GCSE Science
April 1987 5-a-day
Every sheet in April 1987
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 1987State the value of the Avogadro constant and what it counts.
- 2nd April 1987A reaction profile shows the reactants at 150 kJ and the peak (activation energy point) at 195 kJ. Calculate the activation energy.
- 3rd April 1987In the Haber process, N2(g) + 3H2(g) -> 2NH3(g), state the effect of decreasing the pressure on the position of equilibrium.
- 4th April 1987Write the ionic equation for the precipitation reaction between barium ions and sulfate ions.
- 5th April 1987Write the equation linking power, energy and time, and rearrange it for time.
- 6th April 1987A component has a current of 5.0 A and a resistance of 8.0 ohm. Calculate the power dissipated using P = I^2 x R.
- 7th April 1987A gas is heated in a sealed rigid container. Explain what happens to the pressure.
- 8th April 1987A train travels at a constant velocity of 40 m/s for 3 minutes. Calculate the distance it travels, in km.
- 9th April 1987A microwave oven uses electromagnetic waves with a wavelength of 0.12 m. Calculate the frequency of these waves (speed of light = 3 x 10^8 m/s).
- 10th April 1987Put the following in order of increasing distance from the Sun: Mars, Venus, Saturn, Earth.
- 11th April 1987Define an undifferentiated cell.
- 12th April 1987Which tissue transports water and mineral ions from the roots?
- 13th April 1987Give three uses of the glucose produced in photosynthesis.
- 14th April 1987Name the three-domain system of classification, and name the scientist most associated with proposing it.
- 15th April 1987A 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 1987Explain why steel (an alloy of iron and carbon) is generally harder than pure iron.
- 17th April 1987Why do polymers have higher melting points than small molecules such as methane?
- 18th April 1987Complete: acid + metal carbonate gives ...
- 19th April 1987State the four factors that can increase the rate of a chemical reaction.
- 20th April 1987State the functional group found in all alcohols.
- 21st April 1987Name the two gases produced by photosynthesis and the substance it consumes alongside carbon dioxide.
- 22nd April 1987By what factor does kinetic energy increase if speed is doubled?
- 23rd April 1987Name the change of state when a liquid becomes a gas throughout the liquid, at its boiling point.
- 24th April 1987Define the term 'half-life' of a radioactive isotope.
- 25th April 1987State what happens to the frequency of a wave when it is refracted as it passes into a different material.
- 26th April 1987State two factors that increase the size of the potential difference induced in a coil.
- 27th April 1987A student views a red blood cell at a magnification of x2000. The image of the cell measures 20 mm across. Calculate the real width of the cell, giving your answer in micrometres (um).
- 28th April 1987Describe the positive result of the Biuret test.
- 29th April 1987What is tested during preclinical testing?
- 30th April 1987Put these into the correct order for a reflex arc: motor neuron, receptor, effector, relay neuron, sensory neuron.