Daily Practice · GCSE Science
February 1998 - GCSE Science 5-a-day
Every sheet in February 1998
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st February 1998State the number of protons and the number of neutrons in an alpha particle.
- 2nd February 1998State what happens to the frequency of a wave when it is refracted as it passes into a different material.
- 3rd February 1998State two factors that increase the size of the potential difference induced in a coil.
- 4th February 1998A 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).
- 5th February 1998Why does a food test for sugars need a water bath?
- 6th February 1998Explain what is meant by a double blind trial.
- 7th February 1998Put these into the correct order for a reflex arc: motor neuron, receptor, effector, relay neuron, sensory neuron.
- 8th February 1998State one structural adaptation of a polar bear that helps it survive in a cold environment.
- 9th February 1998State the two main steps used to produce potable water from a fresh water source.
- 10th February 1998State the charge on a calcium ion (Group 2).
- 11th February 1998Give the formula for atom economy.
- 12th February 1998Explain, in terms of the reaction pathway, why adding a catalyst increases the rate of a reaction without changing the overall energy change of the reaction.
- 13th February 1998Name the process used to separate crude oil into fractions.
- 14th February 1998State one advantage of running known reference substances alongside an unknown sample on the same chromatogram, rather than only comparing to published Rf values.
- 15th February 1998How is the uncertainty in a set of repeated readings usually estimated?
- 16th February 1998Define electric current.
- 17th February 1998A source has a half-life of 5 days and an initial activity of 1600 Bq. What is its activity after 15 days?
- 18th February 1998State Newton's First Law of Motion.
- 19th February 1998Two bar magnets are placed with their north poles facing each other. State what happens to the magnets.
- 20th February 1998State what is meant by red-shift.
- 21st February 1998Calculate the surface area to volume ratio of a cube of side 2 cm.
- 22nd February 1998Name the vector that spreads the protist pathogen that causes malaria.
- 23rd February 1998Explain why breathing rate and breathing depth both increase during exercise.
- 24th February 1998In pea plants, purple flower colour (allele H) is dominant over white flower colour (allele h). State the phenotype of a plant with genotype Hh.
- 25th February 1998Give the resolution of a burette that can be read to the nearest half of a small division.
- 26th February 1998Why is an atom electrically neutral?
- 27th February 1998State the law of conservation of mass.
- 28th February 1998State the two materials commonly used as inert electrodes in electrolysis, and explain why they must be inert.