Daily Practice

13+ Common Entrance

12th September 1988

5 questions · Years 7-8 · 744 questions in this band

1
Chemistry: Reactions, Energy and Rates
A reaction between magnesium ribbon and hydrochloric acid gives off heat, and the temperature of the acid rises from 20 degrees C to 35 degrees C. State whether this reaction is exothermic or endothermic, and explain how you know.
2
Chemistry: Metals, the Reactivity Series and Environmental Chemistry
State the method used to extract aluminium from its ore, and explain why this method is needed rather than reduction with carbon.
3
Physics: Forces and Energy
A farmer weighing 900 N stands on the ground. Her boots have a total sole area of 0.03 m^2. Use pressure = force / area to calculate the pressure she exerts on the ground, giving your answer in Pa.
4
Physics: Electricity, Magnetism and Waves
State whether sound is a transverse wave or a longitudinal wave.
5
Physics: Light, Sound and Space
A cliff is 170 m from a person who claps and hears the echo. Use distance = speed x time and a speed of sound of 340 m/s to calculate how long after the clap the echo is heard.

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