Daily Practice · GCSE Science
December 1970 5-a-day
Every sheet in December 1970
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st December 1970A 3 kg object is raised 2 m. Calculate the gravitational potential energy gained. (g = 9.8 N/kg)
- 2nd December 1970State what happens to the internal energy of a substance as it is heated, in terms of the kinetic and potential energy of its particles.
- 3rd December 1970A 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 1970A 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.
- 5th December 1970Explain why electricity is transmitted through the National Grid at a very high voltage rather than at the voltage used in homes.
- 6th December 1970A microscope has a x10 eyepiece lens and a x20 objective lens. Calculate the total magnification.
- 7th December 1970State two functions of bile.
- 8th December 1970What is an antigen?
- 9th December 1970Name the chemical released at a synapse that carries the signal across the gap.
- 10th December 1970Explain why deforestation to create land for cattle grazing can reduce biodiversity.
- 11th December 1970Explain why potable water is not the same as pure water.
- 12th December 1970Explain why sodium chloride conducts electricity when molten but not when solid.
- 13th December 1970State two reasons why a percentage yield is less than 100 percent.
- 14th December 1970State what is meant by the activation energy of a reaction.
- 15th December 1970State two products, other than water, that can be formed during the incomplete combustion of a hydrocarbon.
- 16th December 1970Explain why the baseline is drawn in pencil rather than ink.
- 17th December 1970Give one reason for taking the gradient from the line of best fit rather than from two data points.
- 18th December 1970State the equation linking potential difference, current and resistance.
- 19th December 1970Define half-life.
- 20th December 1970Explain why a larger vehicle mass increases braking distance.
- 21st December 1970State the type of force that always acts between an induced magnet and the magnet that induced it.
- 22nd December 1970Name the model of the origin of the universe that is supported by red-shift observations.
- 23rd December 1970Define osmosis.
- 24th December 1970Explain why a small number of healthy volunteers are given a very low dose of a new drug in the first stage of a clinical trial.
- 25th December 1970Define oxygen debt.
- 26th December 1970Explain one benefit of the Human Genome Project.
- 27th December 1970A gas syringe collects 48 cubic centimetres of gas in 40 seconds. Calculate the mean rate.
- 28th December 1970Why do isotopes of an element react in the same way?
- 29th December 1970Calculate the Mr of calcium carbonate, CaCO3. (Ca = 40, C = 12, O = 16)
- 30th December 1970Explain why solid sodium chloride does not conduct electricity, but molten sodium chloride does.
- 31st December 1970In the gas-volume required practical measuring how concentration affects rate, state one variable that should be controlled.