Daily Practice · GCSE Science
February 1977 5-a-day
Every sheet in February 1977
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st February 1977Complete the word equation for anaerobic respiration in yeast: glucose -> ___ + ___
- 2nd February 1977Explain why sweating cools the body down.
- 3rd February 1977Thermus aquaticus is a species of bacterium that lives in hot springs at temperatures that would kill most other organisms. State the name given to an organism that is adapted to survive in such extreme conditions.
- 4th February 1977Give one reason distillation of seawater requires a large energy input.
- 5th February 1977Why can an ionic compound conduct electricity when molten or dissolved but not when solid?
- 6th February 1977A 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.
- 7th February 1977State the only substance produced when a hydrogen fuel cell reacts pure hydrogen with pure oxygen.
- 8th February 1977Name the catalyst used when an alkene reacts with hydrogen to form an alkane.
- 9th February 1977Name the two gases released in large amounts by volcanic activity that formed most of the Earth's early atmosphere.
- 10th February 1977Name the energy store associated with a moving car.
- 11th February 1977Give the colour and function of the earth wire.
- 12th February 1977What observation showed the nucleus is positively charged and very small?
- 13th February 1977A force of 40 N is applied 0.25 m from a pivot. Calculate the moment.
- 14th February 1977A 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.
- 15th February 1977A student measures 24 cubic centimetres of gas in 3 minutes. Calculate the rate.
- 16th February 1977State the type of large biological molecule that all enzymes are made from.
- 17th February 1977Give one way of reducing the spread of malaria.
- 18th February 1977Define homeostasis.
- 19th February 1977Give one example of variation that is caused purely by the environment rather than by genes.
- 20th February 1977A sample contains 90% of an isotope with mass number 10 and 10% of an isotope with mass number 11. Calculate the relative atomic mass, to 1 decimal place.
- 21st February 1977Why do elements in the same group have similar chemical properties?
- 22nd February 1977Why is the amount of product directly proportional to the amount of limiting reactant?
- 23rd February 1977Using the values in the previous question, calculate the overall energy change for the reaction.
- 24th February 1977In the Haber process, state the effect of removing some ammonia from the equilibrium mixture as it forms on the position of equilibrium.
- 25th February 1977A solution forms a green precipitate with sodium hydroxide solution. Which ion is present?
- 26th February 1977Give the equation for wave speed and its units.
- 27th February 1977A resistor of resistance 15 ohm is connected to a 6.0 V supply. Calculate the current flowing through it. Use V = I x R.
- 28th February 1977Why does reducing the volume of a gas increase the pressure even though the molecules do not speed up?