Page 31 - 新思维科学学生用书7 样章

2 Materials and their structure

Think like a scientist

Modelling the particles in solids, liquids and gases

In this task, you will describe the strengths and weaknesses of a model.
Work in a small group.
• Arrange yourselves in a pattern, as if you are the particles in a solid.
• Now arrange yourselves as if you are the particles in a liquid.
• Now arrange yourselves as if you are the particles in a gas.

Questions
1 With a partner, discuss and describe the ways in which the particles are

arranged in the three states of matter.
2 Copy and complete these sentences to describe how particles are arranged in
solids, liquids and gases.
• In solids, the particles are arranged

• In liquids, the particles are arranged
• In gases, the particles are arranged

Self-assessment

In what ways was your group a good model for the
particle theory? Think about how well you did for each
of the solid, liquid and gas models.

• Were you in regular rows?
• Were you touching the people around you?
• Could you change your position?

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