Daily Practice · GCSE Science
December 1990 5-a-day
Every sheet in December 1990
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st December 1990State the difference between an antibiotic and a painkiller.
- 2nd December 1990Put these into the correct order for a reflex arc: motor neuron, receptor, effector, relay neuron, sensory neuron.
- 3rd December 1990State one structural adaptation of a polar bear that helps it survive in a cold environment.
- 4th December 1990Define a finite resource, giving one example.
- 5th December 1990State one reason why simple covalent substances such as chlorine have low melting points.
- 6th December 1990Convert 250 cubic centimetres into cubic decimetres.
- 7th December 1990A 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.
- 8th December 1990Name the process used to separate crude oil into fractions.
- 9th December 1990Write the formula for calculating an Rf value.
- 10th December 1990Readings have a mean of 20.0 cm and a range of 1.0 cm. Calculate the percentage uncertainty.
- 11th December 1990What happens to the total resistance when a second resistor is added in parallel, and why?
- 12th December 1990What happens inside the nucleus when a beta particle is emitted?
- 13th December 1990State Newton's First Law of Motion.
- 14th December 1990Two bar magnets are placed with their north poles facing each other. State what happens to the magnets.
- 15th December 1990State what is meant by red-shift.
- 16th December 1990State three factors that increase the rate of diffusion.
- 17th December 1990A student measures the mean diameter of a zone of inhibition as 12 mm. Calculate its radius.
- 18th December 1990Explain why breathing rate and breathing depth both increase during exercise.
- 19th December 1990In pea plants, purple flower colour (allele H) is dominant over white flower colour (allele h). State the phenotype of a plant with genotype Hh.
- 20th December 1990What does 'concordant' mean when applied to titres?
- 21st December 1990What did the alpha scattering experiment show that the plum pudding model could not explain?
- 22nd December 1990Magnesium is burned in an open crucible and the mass increases. Explain why.
- 23rd December 1990State the two materials commonly used as inert electrodes in electrolysis, and explain why they must be inert.
- 24th December 1990Explain how a catalyst increases the rate of a reaction without being used up.
- 25th December 1990Describe the result of the test for carbon dioxide.
- 26th December 1990Give one piece of evidence used to link human activity to recent climate change.
- 27th December 1990Give one advantage and one disadvantage of wind power.
- 28th December 1990Why does the temperature stay constant while a substance boils?
- 29th December 1990A resultant force of 45 N acts on an object of mass 9.0 kg. Calculate its acceleration. Use F = m x a.
- 30th December 1990Give one everyday example of a transverse wave and one everyday example of a longitudinal wave.
- 31st December 1990State what happens to the orbital speed needed for a stable orbit as the orbital radius increases.