Daily Practice · GCSE Science
January 1999 - GCSE Science 5-a-day
Every sheet in January 1999
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st January 1999State why a reflex action is described as involuntary.
- 2nd January 1999A student counts 3, 5, 4 and 8 dandelion plants in four separate 1 m^2 quadrats. Calculate the mean number of dandelions per quadrat.
- 3rd January 1999Define a finite resource, giving one example.
- 4th January 1999State one reason why simple covalent substances such as chlorine have low melting points.
- 5th January 1999Calculate the concentration in moles per cubic decimetre of a solution containing 0.5 mol in 250 cubic centimetres.
- 6th January 1999State the energy transfer that occurs during an endothermic reaction.
- 7th January 1999State what happens to the boiling point of hydrocarbons as their chain length increases.
- 8th January 1999A sample produces only one spot when run in three different solvents. What does this suggest about the sample?
- 9th January 1999Why should a line of best fit be drawn rather than joining the plotted points?
- 10th January 1999In a parallel circuit, how do the branch currents relate to the total current?
- 11th January 1999State the approximate radius of an atom.
- 12th January 1999A 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.
- 13th January 1999Describe the shape of the magnetic field produced around a long straight wire carrying a current.
- 14th January 1999State how the amount of red-shift is related to a galaxy's distance from Earth.
- 15th January 1999Give one adaptation of a root hair cell for absorbing mineral ions.
- 16th January 1999A student measures the mean diameter of a zone of inhibition as 12 mm. Calculate its radius.
- 17th January 1999State the word equation for anaerobic respiration in human muscle cells.
- 18th January 1999State whether cystic fibrosis is caused by a dominant or a recessive allele.
- 19th January 1999Why is a polystyrene cup with a lid used in energy-change experiments?
- 20th January 1999Write the electronic structure of a magnesium atom (12 electrons).
- 21st January 1999A student measures the mass of a beaker of hydrochloric acid and marble chips as they react and finds it falls. Explain why.
- 22nd January 1999Aqueous 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.
- 23rd January 1999In the disappearing cross required practical, state the dependent variable that is measured.
- 24th January 1999Name the gas that relights a glowing splint.
- 25th January 1999Name two gases that dissolve in atmospheric water droplets to cause acid rain.
- 26th January 1999Define power and give its unit.
- 27th January 1999Convert a density of 2.7 grams per cubic centimetre into kilograms per cubic metre.
- 28th January 1999A resultant force of 45 N acts on an object of mass 9.0 kg. Calculate its acceleration. Use F = m x a.
- 29th January 1999A water wave has a wavelength of 0.4 m and a frequency of 2.5 Hz. Calculate its speed.
- 30th January 1999Explain how elements heavier than iron, such as gold, are created and distributed through the universe.
- 31st January 1999Give one advantage of a light microscope over an electron microscope.