Daily Practice · GCSE Science
February 1978 5-a-day
Every sheet in February 1978
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st February 1978Give one use of nanoparticles and one associated risk.
- 2nd February 1978Give the ionic equation for neutralisation.
- 3rd February 1978State what is shown on a rate graph when the line for the volume of gas produced becomes horizontal (flat).
- 4th February 1978Name the type of biological molecule formed when amino acid monomers join together by condensation polymerisation.
- 5th February 1978Explain, in terms of gas molecules, why methane and water vapour, as well as carbon dioxide, are described as greenhouse gases.
- 6th February 1978State the equation for gravitational potential energy.
- 7th February 1978A block has a volume of 50 cm^3 and a mass of 135 g. Calculate its density.
- 8th February 1978Radium-226 (atomic number 88) decays by alpha emission. State the atomic number of the nucleus formed.
- 9th February 1978A radio wave has a wavelength of 3 m. Calculate its frequency, given that all electromagnetic waves travel at 3 x 10^8 m/s in a vacuum.
- 10th February 1978Explain why electricity is transmitted through the National Grid at a very high voltage rather than at the voltage used in homes.
- 11th February 1978A cube-shaped model cell has sides of length 3 cm. Calculate the surface area to volume ratio of the cube. Give your answer in the form n : 1.
- 12th February 1978Explain what happens to an enzyme above its optimum temperature.
- 13th February 1978Name three non-specific defences of the human body.
- 14th February 1978Name the chemical released at a synapse that carries the signal across the gap.
- 15th February 1978Explain why deforestation to create land for cattle grazing can reduce biodiversity.
- 16th February 1978Name the four stages usually considered in a life cycle assessment of a product.
- 17th February 1978A student says that metals conduct electricity because they contain free-moving ions. Explain why this statement is incorrect, and give the correct explanation.
- 18th February 1978Convert a concentration of 0.20 moles per cubic decimetre of NaOH into grams per cubic decimetre. (Mr = 40)
- 19th February 1978State the energy transfer that occurs during an exothermic reaction.
- 20th February 1978State two products, other than water, that can be formed during the incomplete combustion of a hydrocarbon.
- 21st February 1978In a chromatography experiment, a dye spot travels 4.5 cm and the solvent front travels 6.0 cm. Calculate its Rf value.
- 22nd February 1978Define the resolution of a measuring instrument.
- 23rd February 1978Two 4 ohm resistors are connected in series. Calculate the total resistance.
- 24th February 1978Which type of radiation is stopped by a sheet of paper?
- 25th February 1978Explain why a larger vehicle mass increases braking distance.
- 26th February 1978State the type of force that always acts between an induced magnet and the magnet that induced it.
- 27th February 1978Name the model of the origin of the universe that is supported by red-shift observations.
- 28th February 1978Why does active transport require energy?