Daily Practice · GCSE Science
September 1971 5-a-day
Every sheet in September 1971
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st September 1971Calculate the Mr of Ca(OH)2. (Ca = 40, O = 16, H = 1)
- 2nd September 1971Molten zinc chloride, ZnCl2, is electrolysed using inert electrodes. Write the half equation for the reaction at (a) the cathode, and (b) the anode.
- 3rd September 1971A tangent drawn to a volume-time graph at 15 seconds passes through the points (5 s, 6 cm3) and (25 s, 66 cm3). Calculate the rate of reaction at 15 seconds.
- 4th September 1971Which reagent is added, and in what colour change, to test for chlorine gas?
- 5th September 1971Explain how solid carbon particulates released by combustion can cause global dimming.
- 6th September 1971A lamp is supplied with 60 J and transfers 6 J as light. Calculate its efficiency as a percentage.
- 7th September 1971Define specific latent heat of fusion.
- 8th September 1971State whether friction is a contact force or a non-contact force.
- 9th September 1971State the difference between a transverse wave and a longitudinal wave.
- 10th September 1971Name the force that keeps the planets in orbit around the Sun.
- 11th September 1971Give the equation linking magnification, image size and real size.
- 12th September 1971Give one advantage and one disadvantage of a stent.
- 13th September 1971Complete the word equation for anaerobic respiration in yeast: glucose -> ___ + ___
- 14th September 1971Explain why sweating cools the body down.
- 15th September 1971State what is meant by the term ecosystem.
- 16th September 1971Give one reason distillation of seawater requires a large energy input.
- 17th September 1971Describe metallic bonding.
- 18th September 1971A 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.
- 19th September 1971State whether breaking a chemical bond requires energy or releases energy.
- 20th September 1971Name the catalyst used when an alkene reacts with hydrogen to form an alkane.
- 21st September 1971Name the two gases released in large amounts by volcanic activity that formed most of the Earth's early atmosphere.
- 22nd September 1971Name the energy store associated with a moving car.
- 23rd September 1971Why does the national grid transmit electricity at a very high potential difference?
- 24th September 1971Why is the atomic model a good example of how scientific models change?
- 25th September 1971A force of 40 N is applied 0.25 m from a pivot. Calculate the moment.
- 26th September 1971A rectangular coil carrying a current is placed in a magnetic field, with its two long sides parallel to each other. Explain why the coil rotates rather than moving in a straight line.
- 27th September 1971Define the independent variable.
- 28th September 1971State the type of large biological molecule that all enzymes are made from.
- 29th September 1971Name the type of pathogen that causes malaria.
- 30th September 1971Define homeostasis.