Daily Practice · GCSE Science
April 1979 5-a-day
Every sheet in April 1979
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 1979A student counts 3, 5, 4 and 8 dandelion plants in four separate 1 m^2 quadrats. Calculate the mean number of dandelions per quadrat.
- 2nd April 1979State the two main steps used to produce potable water from a fresh water source.
- 3rd April 1979State the charge on a calcium ion (Group 2).
- 4th April 1979Give the formula for atom economy.
- 5th April 1979Explain, 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.
- 6th April 1979State what happens to the boiling point of hydrocarbons as their chain length increases.
- 7th April 1979State one advantage of running known reference substances alongside an unknown sample on the same chromatogram, rather than only comparing to published Rf values.
- 8th April 1979How is the uncertainty in a set of repeated readings usually estimated?
- 9th April 1979Define electric current.
- 10th April 1979A source has a half-life of 5 days and an initial activity of 1600 Bq. What is its activity after 15 days?
- 11th April 1979A 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.
- 12th April 1979Describe the shape of the magnetic field produced around a long straight wire carrying a current.
- 13th April 1979State how the amount of red-shift is related to a galaxy's distance from Earth.
- 14th April 1979Calculate the surface area to volume ratio of a cube of side 2 cm.
- 15th April 1979Name the vector that spreads the protist pathogen that causes malaria.
- 16th April 1979State the word equation for anaerobic respiration in human muscle cells.
- 17th April 1979State whether cystic fibrosis is caused by a dominant or a recessive allele.
- 18th April 1979Give the resolution of a burette that can be read to the nearest half of a small division.
- 19th April 1979Why is an atom electrically neutral?
- 20th April 1979State the law of conservation of mass.
- 21st April 1979Aqueous 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.
- 22nd April 1979In the disappearing cross required practical, state the dependent variable that is measured.
- 23rd April 1979Give one piece of evidence that a solid sample is impure, based on its melting behaviour.
- 24th April 1979Explain why carbon monoxide is dangerous even though it has no smell.
- 25th April 1979Why can no device be 100 percent efficient?
- 26th April 1979Why is melting described as a physical change?
- 27th April 1979A gardener pushes a mower with a force of 60 N through a distance of 8.0 m. Calculate the work done. Use W = F x s.
- 28th April 1979A water wave has a wavelength of 0.4 m and a frequency of 2.5 Hz. Calculate its speed.
- 29th April 1979Explain how elements heavier than iron, such as gold, are created and distributed through the universe.
- 30th April 1979Convert 0.05 mm into micrometres.