Three and four mark questions

These are similar to one and two mark questions but you will be expected to write in more depth for three and four mark questions.

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Three and four mark questions usually require longer answers.

Edexcel questions courtesy of Pearson Education Ltd.

Sample question 1 - Foundation and Higher

Question

Complete each box in the figure to show how particles are arranged in a solid, liquid and gas.

One particle in each box has been drawn for you. [3 marks]

Three boxes representing a solid, a liquid and a gas. There is a single particle in each.
Three boxes showing how particles are arranged in a solid, a liquid and a gas.

Solid particles must be touching in a regular pattern [1]. Liquid particles should be touching but not regularly arranged [1]. Gas particles should not touch [1].

Do not spend a long time drawing circles to fill the boxes - use the time on other questions.

Sample question 2 - Foundation and Higher

Question

Oxygen cylinders can be used in an ambulance. Explain how particles of oxygen gas exert a pressure on the inside of the cylinder. [3 marks]

The oxygen particles move around at high speed [1]. They collide with the walls of the cylinder [1], exerting a force on the inside of the cyclinder [1].

Sample question 3 - Higher

Question

Describe how the average kinetic energy (KE) of the particles of the gas changes as the temperature of the gas changes. [3 marks]

Average KE increases as the temperature increases [1]. When the KE doubles the temperature in kelvin doubles [1], so it is directly proportional [1].