Daily Practice · GCSE Science
December 1968 5-a-day
Every sheet in December 1968
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st December 1968A 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 December 1968Name the equipment used to measure the abundance of a small plant species within a sample area.
- 3rd December 1968State one benefit of recycling metal rather than extracting new metal from its ore.
- 4th December 1968Name the three types of strong chemical bonding.
- 5th December 1968Convert 250 cubic centimetres into cubic decimetres.
- 6th December 1968A student heats solid copper carbonate strongly in a test tube, and it breaks down into copper oxide and carbon dioxide. Heating must be continued throughout the reaction for it to keep going. State whether this thermal decomposition reaction is exothermic or endothermic, and explain your reasoning.
- 7th December 1968Define the term 'hydrocarbon'.
- 8th December 1968Write the formula for calculating an Rf value.
- 9th December 1968Readings have a mean of 20.0 cm and a range of 1.0 cm. Calculate the percentage uncertainty.
- 10th December 1968What happens to the total resistance when a second resistor is added in parallel, and why?
- 11th December 1968What happens inside the nucleus when a beta particle is emitted?
- 12th December 1968A shopping trolley has a mass of 25 kg. Calculate its weight, taking g = 9.8 N/kg.
- 13th December 1968A 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 December 1968Explain 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 December 1968State three factors that increase the rate of diffusion.
- 16th December 1968State one way that pathogens can be spread from person to person.
- 17th December 1968Explain, in terms of respiration, why a build-up of lactic acid causes muscle fatigue during vigorous exercise.
- 18th December 1968A man has genotype XY. State his sex, and state which sex chromosomes are found in the sperm cells he produces.
- 19th December 1968What does 'concordant' mean when applied to titres?
- 20th December 1968What did the alpha scattering experiment show that the plum pudding model could not explain?
- 21st December 1968Magnesium is burned in an open crucible and the mass increases. Explain why.
- 22nd December 1968In the industrial extraction of aluminium, explain why the aluminium oxide is dissolved in molten cryolite rather than melted on its own.
- 23rd December 1968Explain why increasing the surface area of a solid reactant increases the rate of a reaction.
- 24th December 1968Describe the result of the test for carbon dioxide.
- 25th December 1968Give one piece of evidence used to link human activity to recent climate change.
- 26th December 1968Give one advantage and one disadvantage of wind power.
- 27th December 1968Why does the temperature stay constant while a substance boils?
- 28th December 1968State whether friction is a contact force or a non-contact force.
- 29th December 1968A wave has a frequency of 50 Hz. Calculate its period.
- 30th December 1968Explain, in terms of forces, why an orbiting satellite does not travel off in a straight line.
- 31st December 1968Where is the DNA found in a bacterial cell?