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TGB3:
Review of ideas
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Notes
on ‘Think for Yourself’ questions.
You could use these questions to prompt discussion, or you
might ask students to write down the answers. The questions
and suggested answers are listed below:
‘How do the animations show that the wax is in
the solid state?’
The particles are in fixed positions;
they keep the same neighbours; there is a pattern.
Why do the particles in a solid behave like this?
The particles’ hold on each other is strong enough to
stop them moving around; they can only vibrate, keeping the
same neighbours.
‘What happens to the particles if a lump of wax
is heated from 20ºC to 50ºC?’
The particles become more energetic; they shake or vibrate
about more vigorously; they don’t have enough energy
to break loose from the hold.
‘What happens to the particles when the wax is heated
to its melting point?’
The particles have enough energy to shake loose, but the holding
power of the particles is still strong enough to keep them
close together; the particles can move past each other; there
is no overall pattern.
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Science Enhancement Programme CD-ROM 2005 |
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user
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