Daily Practice · GCSE Science
February 1981 5-a-day
Every sheet in February 1981
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st February 1981State whether cystic fibrosis is caused by a dominant or a recessive allele.
- 2nd February 1981Why is the burette rinsed with the solution it is going to contain rather than with water?
- 3rd February 1981State the relative mass and relative charge of a neutron.
- 4th February 1981Calculate the Mr of Ca(OH)2. (Ca = 40, O = 16, H = 1)
- 5th February 1981Aqueous 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.
- 6th February 1981In the disappearing cross required practical, state the dependent variable that is measured.
- 7th February 1981Which reagent is added, and in what colour change, to test for chlorine gas?
- 8th February 1981Explain how solid carbon particulates released by combustion can cause global dimming.
- 9th February 1981A lamp is supplied with 60 J and transfers 6 J as light. Calculate its efficiency as a percentage.
- 10th February 1981Define specific latent heat of fusion.
- 11th February 1981State whether friction is a contact force or a non-contact force.
- 12th February 1981A water wave has a wavelength of 0.4 m and a frequency of 2.5 Hz. Calculate its speed.
- 13th February 1981Explain how elements heavier than iron, such as gold, are created and distributed through the universe.
- 14th February 1981Give the equation linking magnification, image size and real size.
- 15th February 1981Give one advantage and one disadvantage of a stent.
- 16th February 1981Complete the word equation for anaerobic respiration in yeast: glucose -> ___ + ___
- 17th February 1981State the type of diabetes in which the pancreas produces little or no insulin.
- 18th February 1981State what is meant by the term ecosystem.
- 19th February 1981Give one reason distillation of seawater requires a large energy input.
- 20th February 1981Describe metallic bonding.
- 21st February 1981A student reacts 2.4 g of magnesium with excess dilute hydrochloric acid: Mg + 2HCl -> MgCl2 + H2. Relative atomic mass of Mg = 24. Calculate the number of moles of hydrogen gas produced.
- 22nd February 1981State whether breaking a chemical bond requires energy or releases energy.
- 23rd February 1981Describe the colour change seen when an alkene is shaken with bromine water.
- 24th February 1981Name the two gases released in large amounts by volcanic activity that formed most of the Earth's early atmosphere.
- 25th February 1981Name the energy store associated with a moving car.
- 26th February 1981Why does the national grid transmit electricity at a very high potential difference?
- 27th February 1981Why is the atomic model a good example of how scientific models change?
- 28th February 1981State the name of the upward force acting on an object placed in a fluid.