Daily Practice · GCSE Science
April 1989 5-a-day
Every sheet in April 1989
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 1989State the difference between resolution and accuracy.
- 2nd April 1989State the type of large biological molecule that all enzymes are made from.
- 3rd April 1989How do bacteria make a person feel ill?
- 4th April 1989Name the hormone released when blood glucose concentration is too high, and state its overall effect.
- 5th April 1989Define mutation.
- 6th April 1989A sample contains 90% of an isotope with mass number 10 and 10% of an isotope with mass number 11. Calculate the relative atomic mass, to 1 decimal place.
- 7th April 1989On what property are elements ordered in the modern periodic table?
- 8th April 1989In the equation 2H2 + O2 gives 2H2O, how many moles of water are formed from 3 mol of hydrogen?
- 9th April 1989Using the values in the previous question, calculate the overall energy change for the reaction.
- 10th April 1989The forward reaction of a particular reversible reaction is exothermic. State whether the reverse reaction is exothermic or endothermic.
- 11th April 1989Why must dilute nitric acid be added before silver nitrate solution when testing for a halide ion?
- 12th April 1989State the equation for work done.
- 13th April 1989A resistor of resistance 15 ohm is connected to a 6.0 V supply. Calculate the current flowing through it. Use V = I x R.
- 14th April 1989State the relationship between pressure and volume for a fixed mass of gas at constant temperature.
- 15th April 1989State what the gradient of a distance-time graph represents.
- 16th April 1989Explain why ultraviolet, X-rays and gamma rays can be hazardous to human health, but radio waves are not.
- 17th April 1989Explain, in terms of forces, why a satellite in a stable orbit does not fall towards the Earth or fly off into space.
- 18th April 1989Where in a plant are stem cells found?
- 19th April 1989Name the process by which dissolved sugars are transported in the phloem.
- 20th April 1989Why is photosynthesis described as endothermic?
- 21st April 1989In pea plants, the allele for tall stems (T) is dominant over the allele for short stems (t). A homozygous tall plant (TT) is crossed with a homozygous short plant (tt). State the genotype and phenotype of all the offspring.
- 22nd April 1989State one human activity that reduces the amount of land available for other organisms.
- 23rd April 1989State the two substances that must both be present for iron to rust.
- 24th April 1989State the size range of a nanoparticle.
- 25th April 1989Why is aluminium extracted by electrolysis rather than by reduction with carbon?
- 26th April 1989Explain, using collision theory, why increasing the concentration of a reactant in solution increases the rate of a reaction.
- 27th April 1989State what happens to the carbon-to-carbon double bond of an alkene monomer during addition polymerisation.
- 28th April 1989State two long-term stores of carbon that removed carbon dioxide from the early atmosphere.
- 29th April 1989What happens to the energy described as 'wasted' in a transfer?
- 30th April 1989Calculate the energy needed to melt 0.50 kg of a substance with a specific latent heat of fusion of 210000 J/kg.