Daily Practice · GCSE Science
February 1973 5-a-day
Every sheet in February 1973
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st February 1973State the type of large biological molecule that all enzymes are made from.
- 2nd February 1973State two ways measles is prevented from spreading.
- 3rd February 1973Name the hormone released when blood glucose concentration is too high, and state its overall effect.
- 4th February 1973Define mutation.
- 5th February 1973A 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.
- 6th February 1973Give two observations when lithium is added to water.
- 7th February 1973State the value of the Avogadro constant and what it counts.
- 8th February 1973Using the values in the previous question, calculate the overall energy change for the reaction.
- 9th February 1973The forward reaction of a particular reversible reaction is exothermic. State whether the reverse reaction is exothermic or endothermic.
- 10th February 1973Write the ionic equation for the precipitation reaction between barium ions and sulfate ions.
- 11th February 1973Write the equation linking power, energy and time, and rearrange it for time.
- 12th February 1973A resistor of resistance 15 ohm is connected to a 6.0 V supply. Calculate the current flowing through it. Use V = I x R.
- 13th February 1973A gas is heated in a sealed rigid container. Explain what happens to the pressure.
- 14th February 1973State what the gradient of a distance-time graph represents.
- 15th February 1973Explain why ultraviolet, X-rays and gamma rays can be hazardous to human health, but radio waves are not.
- 16th February 1973Explain, in terms of forces, why a satellite in a stable orbit does not fall towards the Earth or fly off into space.
- 17th February 1973Define an undifferentiated cell.
- 18th February 1973Which tissue transports water and mineral ions from the roots?
- 19th February 1973Give three uses of the glucose produced in photosynthesis.
- 20th February 1973In 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.
- 21st February 1973A peat bog covered an area of 850 hectares in 2015. By 2025, drainage for farmland had reduced the peat bog to 680 hectares. Calculate the percentage decrease in the area of the peat bog.
- 22nd February 1973Explain why steel (an alloy of iron and carbon) is generally harder than pure iron.
- 23rd February 1973Why do polymers have higher melting points than small molecules such as methane?
- 24th February 1973Complete: acid + metal carbonate gives ...
- 25th February 1973State the four factors that can increase the rate of a chemical reaction.
- 26th February 1973State what happens to the carbon-to-carbon double bond of an alkene monomer during addition polymerisation.
- 27th February 1973State two long-term stores of carbon that removed carbon dioxide from the early atmosphere.
- 28th February 1973By what factor does kinetic energy increase if speed is doubled?