Daily Practice · GCSE Science
August 1986 5-a-day
Every sheet in August 1986
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st August 1986A solution forms a green precipitate with sodium hydroxide solution. Which ion is present?
- 2nd August 1986Give the equation for wave speed and its units.
- 3rd August 1986A resistor of resistance 15 ohm is connected to a 6.0 V supply. Calculate the current flowing through it. Use V = I x R.
- 4th August 1986Why does reducing the volume of a gas increase the pressure even though the molecules do not speed up?
- 5th August 1986On a velocity-time graph, what does the area between the line and the time axis represent?
- 6th August 1986State the speed of all electromagnetic waves travelling through a vacuum.
- 7th August 1986State the name of the force that keeps a satellite in orbit around the Earth.
- 8th August 1986Give one risk of stem cell treatment.
- 9th August 1986Why does a potometer measure water uptake rather than transpiration directly?
- 10th August 1986Why does the rate of photosynthesis fall at very high temperatures?
- 11th August 1986A plant grown in the shade is shorter than a genetically identical plant of the same species grown in full sunlight. State whether this difference is genetic variation, environmental variation, or both.
- 12th August 1986Explain why large-scale deforestation increases the concentration of carbon dioxide in the atmosphere.
- 13th August 1986State the four stages considered in a life cycle assessment.
- 14th August 1986Why does simple molecular carbon dioxide have a much lower melting point than giant covalent silicon dioxide?
- 15th August 1986Define oxidation in terms of electrons.
- 16th August 1986State two units that the rate of a reaction can be measured in.
- 17th August 1986Name the small molecule typically released as a by-product during condensation polymerisation.
- 18th August 1986State two long-term stores of carbon that removed carbon dioxide from the early atmosphere.
- 19th August 1986A 3 kg object is raised 2 m. Calculate the gravitational potential energy gained. (g = 9.8 N/kg)
- 20th August 1986Calculate the energy needed to melt 0.50 kg of a substance with a specific latent heat of fusion of 210000 J/kg.
- 21st August 1986A GM tube detects a count rate of 240 counts per minute from a source. After 15 days the count rate has fallen to 30 counts per minute. Show that this data is consistent with a half-life of 5 days.
- 22nd August 1986A water wave has a frequency of 4 Hz and a wavelength of 0.5 m. Calculate its speed.
- 23rd August 1986A transformer's primary coil is connected to a 12 V supply and has 60 turns. Calculate the number of turns needed on the secondary coil to produce an output of 3.0 V.
- 24th August 1986Name the structure in a plant cell that controls the substances entering and leaving the cell.
- 25th August 1986State two functions of bile.
- 26th August 1986What is an antigen?
- 27th August 1986Define a synapse.
- 28th August 1986Give one example of an abiotic factor that could affect where a plant species grows.
- 29th August 1986Name two methods of desalinating seawater.
- 30th August 1986Name the giant covalent structure made of carbon in which each carbon atom is bonded to four others.
- 31st August 1986State two reasons why a percentage yield is less than 100 percent.