Daily Practice · GCSE Science
December 1981 5-a-day
Every sheet in December 1981
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st December 1981A 3 kg object is raised 2 m. Calculate the gravitational potential energy gained. (g = 9.8 N/kg)
- 2nd December 1981Name the change of state when a liquid becomes a gas throughout the liquid, at its boiling point.
- 3rd December 1981A GM tube detects a count rate of 240 counts per minute from a source. After 15 days the count rate has fallen to 30 counts per minute. Show that this data is consistent with a half-life of 5 days.
- 4th December 1981State what happens to the frequency of a wave when it is refracted as it passes into a different material.
- 5th December 1981State two factors that increase the size of the potential difference induced in a coil.
- 6th December 1981A student views a red blood cell at a magnification of x2000. The image of the cell measures 20 mm across. Calculate the real width of the cell, giving your answer in micrometres (um).
- 7th December 1981State two functions of bile.
- 8th December 1981What is an antigen?
- 9th December 1981Put these into the correct order for a reflex arc: motor neuron, receptor, effector, relay neuron, sensory neuron.
- 10th December 1981State one structural adaptation of a polar bear that helps it survive in a cold environment.
- 11th December 1981State the two main steps used to produce potable water from a fresh water source.
- 12th December 1981State the charge on a calcium ion (Group 2).
- 13th December 1981State two reasons why a percentage yield is less than 100 percent.
- 14th December 1981State what is meant by the activation energy of a reaction.
- 15th December 1981Name the process used to separate crude oil into fractions.
- 16th December 1981Explain why the baseline is drawn in pencil rather than ink.
- 17th December 1981Give one reason for taking the gradient from the line of best fit rather than from two data points.
- 18th December 1981State the equation linking potential difference, current and resistance.
- 19th December 1981Define half-life.
- 20th December 1981State Newton's First Law of Motion.
- 21st December 1981Two bar magnets are placed with their north poles facing each other. State what happens to the magnets.
- 22nd December 1981State what is meant by red-shift.
- 23rd December 1981Define osmosis.
- 24th December 1981Name the vector that spreads the protist pathogen that causes malaria.
- 25th December 1981Explain why breathing rate and breathing depth both increase during exercise.
- 26th December 1981In pea plants, purple flower colour (allele H) is dominant over white flower colour (allele h). State the phenotype of a plant with genotype Hh.
- 27th December 1981A gas syringe collects 48 cubic centimetres of gas in 40 seconds. Calculate the mean rate.
- 28th December 1981Why do isotopes of an element react in the same way?
- 29th December 1981Calculate the Mr of calcium carbonate, CaCO3. (Ca = 40, C = 12, O = 16)
- 30th December 1981State the two materials commonly used as inert electrodes in electrolysis, and explain why they must be inert.
- 31st December 1981Explain how a catalyst increases the rate of a reaction without being used up.