Daily Practice · GCSE Science
July 1978 5-a-day
Every sheet in July 1978
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st July 1978The forward reaction of a particular reversible reaction is exothermic. State whether the reverse reaction is exothermic or endothermic.
- 2nd July 1978A solution gives a cream precipitate when acidified with dilute nitric acid and then treated with silver nitrate solution. Name the halide ion present.
- 3rd July 1978A device transfers 4500 J in 90 s. Calculate its power.
- 4th July 1978A resistor of resistance 15 ohm is connected to a 6.0 V supply. Calculate the current flowing through it. Use V = I x R.
- 5th July 1978Why does a bicycle pump get warm when used?
- 6th July 1978State what the gradient of a distance-time graph represents.
- 7th July 1978Explain why ultraviolet, X-rays and gamma rays can be hazardous to human health, but radio waves are not.
- 8th July 1978Explain, in terms of forces, why a satellite in a stable orbit does not fall towards the Earth or fly off into space.
- 9th July 1978What happens to the DNA before mitosis begins?
- 10th July 1978State two conditions that increase the rate of transpiration.
- 11th July 1978A lamp is moved from 15 cm to 30 cm away. What happens to the light intensity?
- 12th July 1978In 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.
- 13th July 1978Name the biological process that removes carbon dioxide from the atmosphere and converts it into carbon compounds in a plant.
- 14th July 1978State one environmental benefit of recycling aluminium cans rather than making new aluminium from ore.
- 15th July 1978Explain why graphite conducts electricity but diamond does not.
- 16th July 1978State what is observed when magnesium ribbon is added to copper sulfate solution.
- 17th July 1978State the equation for the mean rate of a reaction in terms of the quantity of reactant used.
- 18th July 1978State what happens to the carbon-to-carbon double bond of an alkene monomer during addition polymerisation.
- 19th July 1978State two long-term stores of carbon that removed carbon dioxide from the early atmosphere.
- 20th July 1978Calculate the kinetic energy of a 0.5 kg ball moving at 6 m/s.
- 21st July 1978Calculate the energy needed to melt 0.50 kg of a substance with a specific latent heat of fusion of 210000 J/kg.
- 22nd July 1978Explain why americium-241, an alpha emitter, is suitable for use in a smoke detector.
- 23rd July 1978Name the type of electromagnetic wave used to sterilise medical equipment.
- 24th July 1978A 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.
- 25th July 1978Name the structure in a plant cell that controls the substances entering and leaving the cell.
- 26th July 1978Where is bile made and where is it stored?
- 27th July 1978Why does a vaccinated person not usually become ill when they meet the pathogen?
- 28th July 1978Explain why reflex responses are faster than voluntary responses.
- 29th July 1978Define community, in ecological terms.
- 30th July 1978Name two methods of desalinating seawater.
- 31st July 1978Name the giant covalent structure made of carbon in which each carbon atom is bonded to four others.