Daily Practice · GCSE Science
December 1969 5-a-day
Every sheet in December 1969
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st December 1969Write the word equation for the reaction between zinc and hydrochloric acid.
- 2nd December 1969Hydrogen reacts with chlorine to form hydrogen chloride: H2 + Cl2 -> 2HCl. Use the bond energies given to calculate the overall energy change for this reaction. Bond energies: H-H = 436 kJ/mol, Cl-Cl = 243 kJ/mol, H-Cl = 432 kJ/mol.
- 3rd December 1969Name the catalyst used when an alkene reacts with hydrogen to form an alkane.
- 4th December 1969State the approximate percentage of nitrogen in today's atmosphere.
- 5th December 1969A spring is compressed. Which energy store increases?
- 6th December 1969Give the equation linking energy transferred, charge flow and potential difference.
- 7th December 1969Who provided the evidence for the existence of the neutron, and roughly when relative to the nuclear model?
- 8th December 1969A force of 40 N is applied 0.25 m from a pivot. Calculate the moment.
- 9th December 1969A 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.
- 10th December 1969Why does taking repeat readings and calculating a mean improve the data?
- 11th December 1969Name the organ system responsible for breaking food down into small, soluble molecules.
- 12th December 1969State two ways measles is prevented from spreading.
- 13th December 1969Define homeostasis.
- 14th December 1969Give one example of variation that is caused purely by the environment rather than by genes.
- 15th December 1969An atom has atomic number 9 and mass number 19. Calculate the number of neutrons.
- 16th December 1969Give two observations when lithium is added to water.
- 17th December 1969State the value of the Avogadro constant and what it counts.
- 18th December 1969Give one everyday example of an endothermic process.
- 19th December 1969In the Haber process, state the effect of removing some ammonia from the equilibrium mixture as it forms on the position of equilibrium.
- 20th December 1969Write the ionic equation for the precipitation reaction between barium ions and sulfate ions.
- 21st December 1969Write the equation linking power, energy and time, and rearrange it for time.
- 22nd December 1969A current of 2.0 A flows through a resistor for 30 s. Calculate the charge that flows. Use Q = I x t.
- 23rd December 1969A gas is heated in a sealed rigid container. Explain what happens to the pressure.
- 24th December 1969A runner completes a 400 m race in 52 s. Calculate her average speed, giving your answer to 3 significant figures.
- 25th December 1969Name the type of electromagnetic wave used by a television remote control.
- 26th December 1969Explain why a satellite moving in a stable circular orbit has a changing velocity even though its speed stays constant.
- 27th December 1969Define an undifferentiated cell.
- 28th December 1969Which tissue transports water and mineral ions from the roots?
- 29th December 1969Give three uses of the glucose produced in photosynthesis.
- 30th December 1969Explain, using the idea of natural selection, why a population of insects can become resistant to a pesticide over time.
- 31st December 1969A peat bog covered an area of 850 hectares in 2015. By 2025, drainage for farmland had reduced the peat bog to 680 hectares. Calculate the percentage decrease in the area of the peat bog.