Daily Practice · GCSE Science
August 1974 5-a-day
Every sheet in August 1974
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st August 1974Why is an atom electrically neutral?
- 2nd August 1974State the law of conservation of mass.
- 3rd August 1974Explain why solid sodium chloride does not conduct electricity, but molten sodium chloride does.
- 4th August 1974In the gas-volume required practical measuring how concentration affects rate, state one variable that should be controlled.
- 5th August 1974Give one piece of evidence that a solid sample is impure, based on its melting behaviour.
- 6th August 1974Explain why carbon monoxide is dangerous even though it has no smell.
- 7th August 1974Why can no device be 100 percent efficient?
- 8th August 1974Why is melting described as a physical change?
- 9th August 1974Calculate the weight of an object of mass 8.0 kg on Earth, where g = 9.8 N/kg.
- 10th August 1974A wave travels from air into glass and slows down. State what happens to its direction, and explain why in terms of wavelength.
- 11th August 1974State what a nebula is, and explain its role in the life cycle of a star.
- 12th August 1974Convert 0.05 mm into micrometres.
- 13th August 1974State the function of the valves in the heart and in veins.
- 14th August 1974Name the gas that is released as a product of photosynthesis.
- 15th August 1974Name the hormone released by the adrenal glands that prepares the body for fight or flight.
- 16th August 1974The Arctic fox has small, rounded ears compared with the desert fennec fox, which has very large ears. State whether this is a structural, behavioural or functional adaptation, and explain how it helps the Arctic fox survive.
- 17th August 1974Explain why potable water is not required to be chemically pure.
- 18th August 1974Write the formula of calcium chloride and explain the ratio.
- 19th August 1974State the name given to a reaction in which a substance loses electrons.
- 20th August 1974Hydrogen reacts with chlorine to form hydrogen chloride: H2 + Cl2 -> 2HCl. Use the bond energies given to calculate the overall energy change for this reaction. Bond energies: H-H = 436 kJ/mol, Cl-Cl = 243 kJ/mol, H-Cl = 432 kJ/mol.
- 21st August 1974State the general formula of the alkenes.
- 22nd August 1974Give two processes that removed carbon dioxide from the early atmosphere.
- 23rd August 1974Calculate the kinetic energy of a 2.0 kg trolley moving at 4.0 m/s.
- 24th August 1974Give the equation linking energy transferred, charge flow and potential difference.
- 25th August 1974Who provided the evidence for the existence of the neutron, and roughly when relative to the nuclear model?
- 26th August 1974A box of weight 120 N has a base area of 0.40 m^2. Calculate the pressure it exerts on the ground.
- 27th August 1974Explain why a current-carrying wire positioned exactly parallel to a magnetic field experiences no force.
- 28th August 1974Why does taking repeat readings and calculating a mean improve the data?
- 29th August 1974Explain why the rate of an enzyme-controlled reaction decreases sharply above the enzyme's optimum temperature.
- 30th August 1974State two ways measles is prevented from spreading.
- 31st August 1974Name the three parts common to every homeostatic control system.