Daily Practice · GCSE Science
August 2007 - GCSE Science 5-a-day
Every GCSE Science sheet published in August 2007, with answers. Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
Every sheet in August 2007
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st August 2007Give the resolution of a burette that can be read to the nearest half of a small division.
- 2nd August 2007Why is an atom electrically neutral?
- 3rd August 2007State the law of conservation of mass.
- 4th August 2007Molten zinc chloride, ZnCl2, is electrolysed using inert electrodes. Write the half equation for the reaction at (a) the cathode, and (b) the anode.
- 5th August 2007A 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.
- 6th August 2007Give one piece of evidence that a solid sample is impure, based on its melting behaviour.
- 7th August 2007Explain why carbon monoxide is dangerous even though it has no smell.
- 8th August 2007Why can no device be 100 percent efficient?
- 9th August 2007Why is melting described as a physical change?
- 10th August 2007A gardener pushes a mower with a force of 60 N through a distance of 8.0 m. Calculate the work done. Use W = F x s.
- 11th August 2007State the difference between a transverse wave and a longitudinal wave.
- 12th August 2007Name the force that keeps the planets in orbit around the Sun.
- 13th August 2007Convert 0.05 mm into micrometres.
- 14th August 2007State the function of the valves in the heart and in veins.
- 15th August 2007Name the organelle in a plant cell where photosynthesis takes place.
- 16th August 2007Explain why sweating cools the body down.
- 17th August 2007The 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 2007Name one method used to sterilise fresh water during the production of potable water.
- 19th August 2007Write the formula of calcium chloride and explain the ratio.
- 20th August 2007Write the word equation for the reaction between zinc and hydrochloric acid.
- 21st August 2007Hydrogen 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 2007Name the catalyst used when an alkene reacts with hydrogen to form an alkane.
- 23rd August 2007State the approximate percentage of nitrogen in today's atmosphere.
- 24th August 2007A spring is compressed. Which energy store increases?
- 25th August 2007Give the equation linking energy transferred, charge flow and potential difference.
- 26th August 2007Who provided the evidence for the existence of the neutron, and roughly when relative to the nuclear model?
- 27th August 2007A force of 40 N is applied 0.25 m from a pivot. Calculate the moment.
- 28th August 2007A 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.
- 29th August 2007Why does taking repeat readings and calculating a mean improve the data?
- 30th August 2007Name the organ system responsible for breaking food down into small, soluble molecules.
- 31st August 2007State two ways measles is prevented from spreading.