Daily Practice

13+ Common Entrance

1st October 1983

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

1
Chemistry: Reactions, Energy and Rates
In the disappearing cross experiment, a student times how long it takes for a cross under the flask to disappear from view. Explain why a shorter time indicates a faster reaction.
2
Chemistry: Metals, the Reactivity Series and Environmental Chemistry
A piece of magnesium ribbon is added to silver nitrate solution. State whether a displacement reaction would occur, and explain why.
3
Physics: Forces and Energy
Ben has a mass of 12 kg. Calculate his weight on Earth. Use weight = mass x gravitational field strength, with g = 10 N/kg.
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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