Daily Practice · GCSE Science
January 1990 5-a-day
Every sheet in January 1990
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st January 1990Name the change of state when a liquid becomes a gas throughout the liquid, at its boiling point.
- 2nd January 1990State one source of natural background radiation and one source of artificial (man-made) background radiation.
- 3rd January 1990State whether sound waves are transverse or longitudinal.
- 4th January 1990State the name of the component at the centre of a transformer's primary and secondary coils, and state its purpose.
- 5th January 1990A 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).
- 6th January 1990What is an enzyme?
- 7th January 1990Describe phagocytosis.
- 8th January 1990State why a reflex action is described as involuntary.
- 9th January 1990A student counts 3, 5, 4 and 8 dandelion plants in four separate 1 m^2 quadrats. Calculate the mean number of dandelions per quadrat.
- 10th January 1990State the two main steps used to produce potable water from a fresh water source.
- 11th January 1990State the charge on a calcium ion (Group 2).
- 12th January 1990Give the formula for percentage yield.
- 13th January 1990A student reacts excess zinc powder with 25 cm3 of copper sulfate solution in a polystyrene cup. The starting temperature is 21.0 degrees C and the maximum temperature reached is 58.5 degrees C. Calculate the temperature change.
- 14th January 1990State what happens to the boiling point of hydrocarbons as their chain length increases.
- 15th January 1990State two advantages of instrumental methods of analysis, such as GC-MS, compared with manual chemical tests.
- 16th January 1990Distinguish repeatability from reproducibility.
- 17th January 1990How does the resistance of a thermistor change as it gets hotter?
- 18th January 1990What is an alpha particle made of?
- 19th January 1990A skateboarder of mass 55 kg moving at 4 m/s collides with and grabs onto a stationary shopping trolley of mass 20 kg, and they move off together. Calculate their combined velocity immediately after the collision.
- 20th January 1990Describe the shape of the magnetic field produced around a long straight wire carrying a current.
- 21st January 1990State how the amount of red-shift is related to a galaxy's distance from Earth.
- 22nd January 1990Explain why a plant cell placed in pure water does not burst.
- 23rd January 1990Name the vector that spreads the protist pathogen that causes malaria.
- 24th January 1990State the word equation for anaerobic respiration in human muscle cells.
- 25th January 1990State whether cystic fibrosis is caused by a dominant or a recessive allele.
- 26th January 1990In the rate experiment where a cross disappears, why is the result subjective?
- 27th January 1990An atom has an atomic number of 17 and a mass number of 37. How many neutrons does it have?
- 28th January 1990Calculate the number of moles in 20 g of calcium carbonate. (Mr = 100)
- 29th January 1990Aqueous copper sulfate solution is electrolysed using inert graphite electrodes. State the products formed at (a) the cathode and (b) the anode, giving a reason for each.
- 30th January 1990In the disappearing cross required practical, state the dependent variable that is measured.
- 31st January 1990A solid gives a lilac flame test. Name the metal ion present.