Daily Practice · GCSE Science
January 2021 - GCSE Science 5-a-day
Every GCSE Science sheet published in January 2021, with answers. Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
Every sheet in January 2021
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st January 2021A ruler is released and falls 20 cm before being caught. Using distance = 0.5 x g x time^2 with g = 9.8 m/s^2, calculate the reaction time, to 3 significant figures.
- 2nd January 2021Name the equipment used to measure the abundance of a small plant species within a sample area.
- 3rd January 2021State the two main steps used to produce potable water from a fresh water source.
- 4th January 2021State the charge on a calcium ion (Group 2).
- 5th January 2021Calculate the concentration in moles per cubic decimetre of a solution containing 0.5 mol in 250 cubic centimetres.
- 6th January 2021State the energy transfer that occurs during an endothermic reaction.
- 7th January 2021Define the term 'hydrocarbon'.
- 8th January 2021A sample produces only one spot when run in three different solvents. What does this suggest about the sample?
- 9th January 2021Why should a line of best fit be drawn rather than joining the plotted points?
- 10th January 2021In a parallel circuit, how do the branch currents relate to the total current?
- 11th January 2021State the approximate radius of an atom.
- 12th January 2021A shopping trolley has a mass of 25 kg. Calculate its weight, taking g = 9.8 N/kg.
- 13th January 2021A student wraps a coil of insulated wire around an iron nail and connects it to a battery. Name the device this creates, and state one way to increase its magnetic field strength.
- 14th January 2021Explain why red-shift observations support the idea that the universe is expanding, rather than Earth simply being at the centre of the universe with everything moving away from it.
- 15th January 2021Give one adaptation of a root hair cell for absorbing mineral ions.
- 16th January 2021Name the vector that spreads the protist pathogen that causes malaria.
- 17th January 2021Explain, in terms of respiration, why a build-up of lactic acid causes muscle fatigue during vigorous exercise.
- 18th January 2021A man has genotype XY. State his sex, and state which sex chromosomes are found in the sperm cells he produces.
- 19th January 2021Why is a polystyrene cup with a lid used in energy-change experiments?
- 20th January 2021Write the electronic structure of a magnesium atom (12 electrons).
- 21st January 2021A student measures the mass of a beaker of hydrochloric acid and marble chips as they react and finds it falls. Explain why.
- 22nd January 2021In the industrial extraction of aluminium, explain why the aluminium oxide is dissolved in molten cryolite rather than melted on its own.
- 23rd January 2021Explain why increasing the surface area of a solid reactant increases the rate of a reaction.
- 24th January 2021Name the gas that relights a glowing splint.
- 25th January 2021Name two gases that dissolve in atmospheric water droplets to cause acid rain.
- 26th January 2021Define power and give its unit.
- 27th January 2021Convert a density of 2.7 grams per cubic centimetre into kilograms per cubic metre.
- 28th January 2021A 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.
- 29th January 2021A wave has a frequency of 50 Hz. Calculate its period.
- 30th January 2021Explain, in terms of forces, why an orbiting satellite does not travel off in a straight line.
- 31st January 2021Give one advantage of a light microscope over an electron microscope.