Daily Practice · GCSE Science
February 1970 5-a-day
Every sheet in February 1970
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st February 1970A man who is a known carrier of cystic fibrosis (Ff) has children with a woman who has been confirmed to carry no cystic fibrosis allele at all (FF). Explain why none of their children can have cystic fibrosis.
- 2nd February 1970Why is the burette rinsed with the solution it is going to contain rather than with water?
- 3rd February 1970State the relative mass and relative charge of a neutron.
- 4th February 1970Calculate the Mr of Ca(OH)2. (Ca = 40, O = 16, H = 1)
- 5th February 1970Concentrated sodium chloride solution (brine) is electrolysed using inert electrodes. State the products formed at the cathode and at the anode.
- 6th February 1970Explain why increasing temperature increases the rate of a reaction, referring to both the frequency and the energy of collisions.
- 7th February 1970Which reagent is added, and in what colour change, to test for chlorine gas?
- 8th February 1970Explain how solid carbon particulates released by combustion can cause global dimming.
- 9th February 1970A lamp is supplied with 60 J and transfers 6 J as light. Calculate its efficiency as a percentage.
- 10th February 1970Define specific latent heat of fusion.
- 11th February 1970A box has a driving force of 250 N forward and friction of 180 N backward. Calculate the resultant force, including its direction.
- 12th February 1970Sound waves travel through a steel rail at approximately 5900 m/s. A sound wave sent along the rail has a frequency of 2950 Hz. Calculate its wavelength.
- 13th February 1970State the eventual fate of a star with a much greater mass than the Sun, after it explodes as a supernova.
- 14th February 1970Give the equation linking magnification, image size and real size.
- 15th February 1970Give one advantage and one disadvantage of a stent.
- 16th February 1970Explain why anaerobic respiration releases much less energy per glucose molecule than aerobic respiration.
- 17th February 1970Name the gland often called the body's master gland.
- 18th February 1970State what is meant by the term ecosystem.
- 19th February 1970State what is meant by sustainable development.
- 20th February 1970Describe metallic bonding.
- 21st February 1970State the pH value of a neutral solution.
- 22nd February 1970State whether breaking a chemical bond requires energy or releases energy.
- 23rd February 1970State the number of covalent bonds a carbon atom forms in a saturated hydrocarbon.
- 24th February 1970Explain, in terms of infrared radiation, how greenhouse gases keep the Earth warm.
- 25th February 1970A motor is supplied with 800 J of energy and wastes 240 J as heat. Calculate its efficiency as a percentage.
- 26th February 1970Why does the national grid transmit electricity at a very high potential difference?
- 27th February 1970Why is the atomic model a good example of how scientific models change?
- 28th February 1970State the equation that links pressure, force and area.