Daily Practice · GCSE Science
April 2003 - GCSE Science 5-a-day
Every GCSE Science sheet published in April 2003, with answers. Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
Every sheet in April 2003
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 2003State what happens to the internal energy of a substance as it is heated, in terms of the kinetic and potential energy of its particles.
- 2nd April 2003Radium-226 (atomic number 88) decays by alpha emission. State the atomic number of the nucleus formed.
- 3rd April 2003A radio wave has a wavelength of 3 m. Calculate its frequency, given that all electromagnetic waves travel at 3 x 10^8 m/s in a vacuum.
- 4th April 2003Explain why electricity is transmitted through the National Grid at a very high voltage rather than at the voltage used in homes.
- 5th April 2003A microscope has a x10 eyepiece lens and a x20 objective lens. Calculate the total magnification.
- 6th April 2003Explain what happens to an enzyme above its optimum temperature.
- 7th April 2003Name three non-specific defences of the human body.
- 8th April 2003Name the chemical released at a synapse that carries the signal across the gap.
- 9th April 2003Explain why deforestation to create land for cattle grazing can reduce biodiversity.
- 10th April 2003Explain why potable water is not the same as pure water.
- 11th April 2003Explain why sodium chloride conducts electricity when molten but not when solid.
- 12th April 2003Convert a concentration of 0.20 moles per cubic decimetre of NaOH into grams per cubic decimetre. (Mr = 40)
- 13th April 2003State the energy transfer that occurs during an exothermic reaction.
- 14th April 2003State two products, other than water, that can be formed during the incomplete combustion of a hydrocarbon.
- 15th April 2003In a chromatography experiment, a dye spot travels 4.5 cm and the solvent front travels 6.0 cm. Calculate its Rf value.
- 16th April 2003Define the resolution of a measuring instrument.
- 17th April 2003Two 4 ohm resistors are connected in series. Calculate the total resistance.
- 18th April 2003Which type of radiation is stopped by a sheet of paper?
- 19th April 2003Explain why a larger vehicle mass increases braking distance.
- 20th April 2003State the type of force that always acts between an induced magnet and the magnet that induced it.
- 21st April 2003Name the model of the origin of the universe that is supported by red-shift observations.
- 22nd April 2003Why does active transport require energy?
- 23rd April 2003Explain why a small number of healthy volunteers are given a very low dose of a new drug in the first stage of a clinical trial.
- 24th April 2003Define oxygen debt.
- 25th April 2003Explain one benefit of the Human Genome Project.
- 26th April 2003Name one way to make a rate of reaction experiment more valid rather than simply more precise.
- 27th April 2003Define an isotope.
- 28th April 2003A sealed flask containing 12.0 g of reactants is shaken and a reaction occurs. What is the total mass afterwards?
- 29th April 2003Explain why solid sodium chloride does not conduct electricity, but molten sodium chloride does.
- 30th April 2003In the gas-volume required practical measuring how concentration affects rate, state one variable that should be controlled.