Daily Practice · GCSE Science
August 2018 - GCSE Science 5-a-day
Every GCSE Science sheet published in August 2018, with answers. Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
Every sheet in August 2018
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st August 2018Give the resolution of a burette that can be read to the nearest half of a small division.
- 2nd August 2018Why is an atom electrically neutral?
- 3rd August 2018State the law of conservation of mass.
- 4th August 2018Concentrated sodium chloride solution (brine) is electrolysed using inert electrodes. State the products formed at the cathode and at the anode.
- 5th August 2018Explain why increasing temperature increases the rate of a reaction, referring to both the frequency and the energy of collisions.
- 6th August 2018Give one piece of evidence that a solid sample is impure, based on its melting behaviour.
- 7th August 2018Explain why carbon monoxide is dangerous even though it has no smell.
- 8th August 2018Why can no device be 100 percent efficient?
- 9th August 2018Why is melting described as a physical change?
- 10th August 2018A box has a driving force of 250 N forward and friction of 180 N backward. Calculate the resultant force, including its direction.
- 11th August 2018Sound waves travel through a steel rail at approximately 5900 m/s. A sound wave sent along the rail has a frequency of 2950 Hz. Calculate its wavelength.
- 12th August 2018State the eventual fate of a star with a much greater mass than the Sun, after it explodes as a supernova.
- 13th August 2018Convert 0.05 mm into micrometres.
- 14th August 2018State the function of the valves in the heart and in veins.
- 15th August 2018Explain why anaerobic respiration releases much less energy per glucose molecule than aerobic respiration.
- 16th August 2018Name the gland often called the body's master gland.
- 17th August 2018The 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.
- 18th August 2018State what is meant by sustainable development.
- 19th August 2018Write the formula of calcium chloride and explain the ratio.
- 20th August 2018State the pH value of a neutral solution.
- 21st August 2018Hydrogen 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.
- 22nd August 2018State the number of covalent bonds a carbon atom forms in a saturated hydrocarbon.
- 23rd August 2018Explain, in terms of infrared radiation, how greenhouse gases keep the Earth warm.
- 24th August 2018A motor is supplied with 800 J of energy and wastes 240 J as heat. Calculate its efficiency as a percentage.
- 25th August 2018Give the equation linking energy transferred, charge flow and potential difference.
- 26th August 2018Who provided the evidence for the existence of the neutron, and roughly when relative to the nuclear model?
- 27th August 2018State the equation that links pressure, force and area.
- 28th August 2018In a simple d.c. electric motor, state the name and function of the component that reverses the current in the coil every half turn.
- 29th August 2018Why does taking repeat readings and calculating a mean improve the data?
- 30th August 2018An amylase reaction is complete after 200 seconds. Calculate the rate of reaction using rate = 1000 / time.
- 31st August 2018State two ways measles is prevented from spreading.