
Thermodynamics short lesson
Presentation
•
Science
•
9th - 12th Grade
•
Hard
+3
Standards-aligned
Corey Trahan
FREE Resource
10 Slides • 10 Questions
1
Thermodynamics, Physical Science
Practice Lesson Key Ideas
2
Multiple Choice
What is the science or study of thermodynamics?
Thermodynamics is the science concerned with heat and it’s movement.
Thermodynamics is the science concerned with anything related to thermal energy.
Thermodynamics is the science concerned with discovering new forms of energy
3
What is HEAT?
4
Multiple Choice
Thermal energy leaves my hand and warms the ice cube I am holding.
The movement of thermal energy is always from a __?__ object to a __?__ object
from cooler object to a warmer object
from warmer object to a cooler object
5
Poll
After running for awhile, does your car's engine get hot & release heat into the surrounding air?
Yes!
No way
I am not sure
6
Waste Energy is Heat Energy
The Heat Energy released from your car is WASTE energy (thermal), a product of every energy transformations.
(Energy in gas - some converts to mechanical energy and some to thermal energy)
7
Multiple Choice
When energy changes form, some energy is always "lost" to heat.
TRUE
FALSE
8
Waste energy-HEAT
Every time energy changes form, some of it is LOST as waste energy (waste, because it is useless). Waste energy is in the form of thermal energy.
9
Multiple Choice
In every transformation, some energy is lost to waste energy.
In terms of efficiency, every energy transformation is ________.
100% efficient
Less than 100% efficient
More than 100% efficient
10
1st Law of Thermodynamics
is also the Law of Conservation of Energy!
ENERGY...
-Can transform from one form to another
-But cannot be created
-And cannot be destroyed
-Total always remains the same
11
2nd Law of Thermodynamics
The 2nd law states that “whenever energy changes form, some of it is always converted to thermal waste energy (heat) & released" to the surroundings
12
Multiple Choice
What does the First Law of Thermodynamics state?
energy can be transformed but cannot be created or destroyed
when energy changes form, some is converted to heat energy
the science concerned with heat and movement
heat energy released to the environment is thermal pollution
13
Multiple Choice
What does the Second Law of Thermodynamics state?
energy can be transformed but cannot be created or destroyed
when energy changes form, some is converted to heat energy
the science concerned with heat and movement
heat energy released to the environment is thermal pollution
14
15
Multiple Choice
What is thermal pollution?
Heat released to the air & water, causing changes
Heat used to warm up a cold area.
A product of radiant light energy
Pollution caused by broken thermometers
16
The Car is 16% Efficient - (16 useful units/100 total units) x 100%
17
Multiple Choice
What is efficiency?
a measure of the useful energy we get from an energy transformation, compared to total energy
a measure of the waste energy we get from an energy transformation, compared to total energy
18
19
20
Multiple Choice
What is one disadvantage of having a car that is inefficient?
Increased tire wear
The time is takes to get somewhere
Low speed of the car
Air pollution
Thermodynamics, Physical Science
Practice Lesson Key Ideas
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