Phase Changes
Presentation
•
Physics
•
5th - 12th Grade
•
Medium
+2
Standards-aligned
Adam Morris
Used 227+ times
FREE Resource
15 Slides • 8 Questions
1
Phase Changes
2
Multiple Select
What are the 3 states of matter we are most familiar with?
solid
liquid
gas
Texas
3
4
The Law of Conservation of Energy states that energy cannot be created nor destroyed, but only changed from one form to another.
5
Multiple Choice
Energy cannot be ___________ or destroyed.
used
created
recycled
6
Thermal energy must be added to change from a solid to a liquid to a gas.
Thermal energy must be removed to change phase from a gas to a liquid to a solid.
7
Poll
Thermal energy probably means ________
heat
electricity
movement
8
Melting – solid changing into a liquid
Vaporization – liquid changing into a gas
Ionization – gas changing into a plasma
Neutralization – plasma changing into a gas
Condensation – gas changing into a liquid
Freezing – liquid changing into a solid
Sublimation – direct change of a solid to a gas or a gas to a solid without going to a liquid state
9
A phase change graph is a temperature vs. time graph displaying the phases of matter and the temperature at which phase changes occur.
10
11
Multiple Choice
On this graph, as time increases, temperature...
increases
decreases
12
13
Multiple Choice
The diagonal lines on a phase change graph represent...
states of matter
phase change from one phase of matter to another
14
15
Multiple Choice
The flat lines on this graph represent
phases of matter
phase changes from one form of matter to another
16
17
As matter changes phase, thermal energy is absorbed or released until all particles of matter have changed. Therefore, the temperature remains constant.
18
Multiple Select
During phase change...
temperature remains the same
the matter is transforming from one form to another
temperature increases
energy is created
19
The melting point is the temperature at which a solid becomes a liquid.
The boiling point is the temperature at which a liquid becomes a gas.
20
The condensation point is the temperature at which a gas becomes a liquid.
Condensation point = Boiling point
The freezing point is the temperature at which a liquid becomes a solid.
Freezing point = Melting point
21
Heating and cooling systems regulate temperature by transferring energy.
A heating system is any device or process that transfers energy to a substance to raise its temperature.
ex. Rubbing hands together, human body, furnace, reptiles basking in the sun, solar panels.
22
A cooling system is any device or process that transfers energy as heat out of a substance to lower its temperature.
ex. Refrigerator, air conditioner, condensation, sweating, heat pumps.
23
Multiple Choice
Heating systems put heat INTO a system and cooling systems...
take heat out
put cold in
Phase Changes
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