
CI- Investigation 8- Phase change
Presentation
•
Science
•
8th Grade
•
Easy
Standards-aligned
Maria Claudia Pace
Used 2+ times
FREE Resource
7 Slides • 3 Questions
1
CI- Investigation 8- Phase change
Melting and Freezing
2
Multiple Choice
The diagram shows 3 states of matte.
What change (s) in kinetic energy would cause the same material to change from solid to liquid to gas, and then from gas to liquid to solid?
must remain the same
must increase, then decrease
has nothing to do with the change of state
must decrease, then increase
3
Think about wax/sucrose melting
Margarine melted—it turned to liquid
Wax got soft but didn’t really melt into liquid.
Sucrose didn’t seem to change at all.
4
5
Thermal Energy
We can use candles to heat wax and sucrose. Before, we studied energy transfer by conduction—when materials touch.
The burning candle flame produces thermal energy, which heats materials near it without touching.
6
7
Open Ended
Why do materials melt when they get hot?
8
Open Ended
What happens at the particle level when a material freezes?
9
10
CI- Investigation 8- Phase change
Melting and Freezing
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