Daily Practice · GCSE Science
December 1983 5-a-day
Every sheet in December 1983
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st December 1983In pea plants, the allele for tall stems (T) is dominant over the allele for short stems (t). A homozygous tall plant (TT) is crossed with a homozygous short plant (tt). State the genotype and phenotype of all the offspring.
- 2nd December 1983State one way in which high biodiversity benefits an ecosystem.
- 3rd December 1983Explain how painting an iron gate helps prevent it from rusting.
- 4th December 1983Why can an ionic solid not conduct electricity?
- 5th December 1983Name the salt made from zinc oxide and nitric acid.
- 6th December 1983State what is meant by a catalyst.
- 7th December 1983State what happens to the carbon-to-carbon double bond of an alkene monomer during addition polymerisation.
- 8th December 1983State two long-term stores of carbon that removed carbon dioxide from the early atmosphere.
- 9th December 1983Define specific heat capacity.
- 10th December 1983Calculate the energy needed to melt 0.50 kg of a substance with a specific latent heat of fusion of 210000 J/kg.
- 11th December 1983State the number of protons and the number of neutrons in an alpha particle.
- 12th December 1983Name the type of electromagnetic wave used to sterilise medical equipment.
- 13th December 1983A transformer has a primary current of 2.0 A and a primary voltage of 230 V. The secondary voltage is 460 V. Assuming the transformer is 100 percent efficient, calculate the secondary current.
- 14th December 1983Name the structure in a plant cell that controls the substances entering and leaving the cell.
- 15th December 1983Why does a food test for sugars need a water bath?
- 16th December 1983Explain what is meant by a double blind trial.
- 17th December 1983Explain why reflex responses are faster than voluntary responses.
- 18th December 1983Define community, in ecological terms.
- 19th December 1983Name two methods of desalinating seawater.
- 20th December 1983Name the giant covalent structure made of carbon in which each carbon atom is bonded to four others.
- 21st December 1983Give the formula for atom economy.
- 22nd December 1983Explain, in terms of the reaction pathway, why adding a catalyst increases the rate of a reaction without changing the overall energy change of the reaction.
- 23rd December 1983Name the two industrial methods of cracking.
- 24th December 1983State one advantage of running known reference substances alongside an unknown sample on the same chromatogram, rather than only comparing to published Rf values.
- 25th December 1983How is the uncertainty in a set of repeated readings usually estimated?
- 26th December 1983Define electric current.
- 27th December 1983A source has a half-life of 5 days and an initial activity of 1600 Bq. What is its activity after 15 days?
- 28th December 1983Explain, using Newton's Third Law, why a swimmer is able to push themselves forward by pushing backward against the water.
- 29th December 1983State what happens to the magnetic field around a straight current-carrying wire if the direction of the current is reversed.
- 30th December 1983State what red-shift shows about the motion of most distant galaxies.
- 31st December 1983Calculate the surface area to volume ratio of a cube of side 2 cm.