Daily Practice

13+ Common Entrance

7th November 2016

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 parcel of mass 2.5 kg is lifted onto a shelf 2 m above the ground. Take g = 10 N/kg and use GPE = mass x g x height. Calculate the gain in gravitational potential energy.
4
Physics: Electricity, Magnetism and Waves
A student doubles the frequency of a wave while keeping its speed the same. State what happens to the wavelength.
5
Physics: Light, Sound and Space
State whether the Earth's day (one full rotation on its axis) or the Earth's year (one full orbit of the Sun) takes longer.

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