Daily Practice · GCSE Science
January 1995 - GCSE Science 5-a-day
Every sheet in January 1995
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st January 1995A student measures the mean diameter of a zone of inhibition as 12 mm. Calculate its radius.
- 2nd January 1995State two things excess glucose can be converted into for storage in the human body.
- 3rd January 1995Define homozygous.
- 4th January 1995Give the resolution of a burette that can be read to the nearest half of a small division.
- 5th January 1995Why is an atom electrically neutral?
- 6th January 1995State the law of conservation of mass.
- 7th January 1995Molten zinc chloride, ZnCl2, is electrolysed using inert electrodes. Write the half equation for the reaction at (a) the cathode, and (b) the anode.
- 8th January 1995A tangent drawn to a volume-time graph at 15 seconds passes through the points (5 s, 6 cm3) and (25 s, 66 cm3). Calculate the rate of reaction at 15 seconds.
- 9th January 1995Give one piece of evidence that a solid sample is impure, based on its melting behaviour.
- 10th January 1995Explain why carbon monoxide is dangerous even though it has no smell.
- 11th January 1995Why can no device be 100 percent efficient?
- 12th January 1995Why is melting described as a physical change?
- 13th January 1995A resultant force of 45 N acts on an object of mass 9.0 kg. Calculate its acceleration. Use F = m x a.
- 14th January 1995State the difference between a transverse wave and a longitudinal wave.
- 15th January 1995Name the force that keeps the planets in orbit around the Sun.
- 16th January 1995Convert 0.05 mm into micrometres.
- 17th January 1995State the function of the valves in the heart and in veins.
- 18th January 1995State three factors that can limit the rate of photosynthesis.
- 19th January 1995Explain why sweating cools the body down.
- 20th January 1995The 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.
- 21st January 1995Explain, in terms of particle size, how reverse osmosis separates water from dissolved salt.
- 22nd January 1995Write the formula of calcium chloride and explain the ratio.
- 23rd January 1995Explain why aluminium cannot be extracted from aluminium oxide by heating with carbon.
- 24th January 1995Hydrogen 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.
- 25th January 1995Name the catalyst used when an alkene reacts with hydrogen to form an alkane.
- 26th January 1995Name three greenhouse gases.
- 27th January 1995A kettle transfers 360000 J of energy in 150 s. Calculate its power in watts.
- 28th January 1995Give the equation linking energy transferred, charge flow and potential difference.
- 29th January 1995Who provided the evidence for the existence of the neutron, and roughly when relative to the nuclear model?
- 30th January 1995A force of 40 N is applied 0.25 m from a pivot. Calculate the moment.
- 31st January 1995A rectangular coil carrying a current is placed in a magnetic field, with its two long sides parallel to each other. Explain why the coil rotates rather than moving in a straight line.