Daily Practice · GCSE Science
March 2009 - GCSE Science 5-a-day
Every GCSE Science sheet published in March 2009, with answers. Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
Every sheet in March 2009
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st March 2009Explain why using a light sensor and data logger is more reliable than timing by eye in the disappearing cross practical.
- 2nd March 2009Give one piece of evidence that a solid sample is impure, based on its melting behaviour.
- 3rd March 2009Explain why carbon monoxide is dangerous even though it has no smell.
- 4th March 2009Why can no device be 100 percent efficient?
- 5th March 2009Why is melting described as a physical change?
- 6th March 2009A box has a driving force of 250 N forward and friction of 180 N backward. Calculate the resultant force, including its direction.
- 7th March 2009Explain, in terms of particle motion, why a wave can transfer energy without transferring matter.
- 8th March 2009Name the region of the Solar System where most asteroids are found.
- 9th March 2009Convert 0.05 mm into micrometres.
- 10th March 2009State the function of the valves in the heart and in veins.
- 11th March 2009Explain why anaerobic respiration releases much less energy per glucose molecule than aerobic respiration.
- 12th March 2009A person's blood glucose concentration is 4.8 mmol/dm^3 before breakfast and 7.2 mmol/dm^3 after breakfast. Calculate the increase in blood glucose concentration.
- 13th March 2009The Arctic fox has small, rounded ears compared with the desert fennec fox, which has very large ears. State whether this is a structural, behavioural or functional adaptation, and explain how it helps the Arctic fox survive.
- 14th March 2009State what is meant by sustainable development.
- 15th March 2009Write the formula of calcium chloride and explain the ratio.
- 16th March 2009State the pH value of a neutral solution.
- 17th March 2009Hydrogen 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.
- 18th March 2009Propene (C3H6) reacts with steam in the presence of a catalyst. Name the catalyst, and name the type of compound formed.
- 19th March 2009Explain, in terms of infrared radiation, how greenhouse gases keep the Earth warm.
- 20th March 2009A motor is supplied with 800 J of energy and wastes 240 J as heat. Calculate its efficiency as a percentage.
- 21st March 2009Give the equation linking energy transferred, charge flow and potential difference.
- 22nd March 2009Who provided the evidence for the existence of the neutron, and roughly when relative to the nuclear model?
- 23rd March 2009State two factors, other than depth, that affect the pressure at a given point in a liquid.
- 24th March 2009State the name of the rule used to find the direction of the force on a current-carrying wire in a magnetic field, and name the three quantities it relates.
- 25th March 2009Why does taking repeat readings and calculating a mean improve the data?
- 26th March 2009An amylase reaction is complete after 200 seconds. Calculate the rate of reaction using rate = 1000 / time.
- 27th March 2009State two ways measles is prevented from spreading.
- 28th March 2009State what is meant by negative feedback.
- 29th March 2009Name the scientist who proposed the three-domain system of classification, and name the three domains.
- 30th March 2009An atom has atomic number 11 and mass number 23. State the number of protons.
- 31st March 2009Give two observations when lithium is added to water.