Daily Practice · GCSE Science
March 1998 - GCSE Science 5-a-day
Every sheet in March 1998
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st March 1998Explain how a catalyst increases the rate of a reaction without being used up.
- 2nd March 1998Give one piece of evidence that a solid sample is impure, based on its melting behaviour.
- 3rd March 1998Explain why carbon monoxide is dangerous even though it has no smell.
- 4th March 1998Why can no device be 100 percent efficient?
- 5th March 1998Why is melting described as a physical change?
- 6th March 1998A 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.
- 7th March 1998Give one everyday example of a transverse wave and one everyday example of a longitudinal wave.
- 8th March 1998State what happens to the orbital speed needed for a stable orbit as the orbital radius increases.
- 9th March 1998Convert 0.05 mm into micrometres.
- 10th March 1998State the function of the valves in the heart and in veins.
- 11th March 1998Name the organelle in a plant cell where photosynthesis takes place.
- 12th March 1998Explain why type 1 diabetes is treated with insulin injections rather than tablets.
- 13th March 1998The 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.
- 14th March 1998Name one method used to sterilise fresh water during the production of potable water.
- 15th March 1998Write the formula of calcium chloride and explain the ratio.
- 16th March 1998Write the word equation for the reaction between zinc and hydrochloric acid.
- 17th March 1998Hydrogen 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.
- 18th March 1998Name the alkene with the molecular formula C4H8.
- 19th March 1998State the approximate percentage of nitrogen in today's atmosphere.
- 20th March 1998A spring is compressed. Which energy store increases?
- 21st March 1998Give the equation linking energy transferred, charge flow and potential difference.
- 22nd March 1998Who provided the evidence for the existence of the neutron, and roughly when relative to the nuclear model?
- 23rd March 1998A spanner is used to loosen a bolt. Explain why using a longer spanner makes it easier to loosen the bolt.
- 24th March 1998State two ways of increasing the force produced by a motor effect setup, for a wire of fixed length at a fixed angle to the field.
- 25th March 1998Why does taking repeat readings and calculating a mean improve the data?
- 26th March 1998Name the organ system responsible for breaking food down into small, soluble molecules.
- 27th March 1998State two ways measles is prevented from spreading.
- 28th March 1998Name the hormone released when blood glucose concentration is too high, and state its overall effect.
- 29th March 1998Define mutation.
- 30th March 1998An atom has atomic number 9 and mass number 19. Calculate the number of neutrons.
- 31st March 1998Give two observations when lithium is added to water.