Page 40 - 新思维科学学生用书7 样章
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2.3 Explaining changes of state
2.3 Explaining changes of state
In this topic you will:
• use the particle theory to explain what happens when matter changes between
states
• use a model to illustrate the particle theory.
Getting started Key words
1 For each process, write down the changes of state. The first attractive force
one has been started for you. expand
• Melting: solid to heat energy
• Condensing:
• Freezing: transferred
2 For each statement, decide if it applies to a solid, a liquid or
a gas. Some may apply to more than one state of matter.
particles in can be can be
regular rows poured compressed
particles has a fixed can change
spread out volume its shape
cannot be has a
compressed fixed shape
Check with a partner. Are you correct?
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