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Transcript of LIVE INTERACTIVE LEARNING @ YOUR DESKTOP · PDF fileLIVE INTERACTIVE LEARNING @ YOUR DESKTOP...
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Title slide
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LIVE INTERACTIVE LEARNING @ YOUR DESKTOP
November 20, 2013
6:30 p.m. ET / 5:30 p.m. CT / 4:30 p.m. MT / 3:30 p.m. PT
Heat, Temperature and Energy: MESSENGER—Cooling with Sunshades
Presented by: Steve Culivan
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http://learningcenter.nsta.org
NSTA Learning Center
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About the NSTA Learning Center
• Discover over 11,100 resources
– 3,900+ free!
– Add to “My Library” and bundle in collections
– Access collections made by NSTA and other teachers
• Connect in the community forums
• Get help from online advisors
• Plan/document learning with free tools
NSTA Learning Center
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http://learningcenter.nsta.org
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Introducing today’s presenter…
Introducing today’s presenters
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Steve Culivan NASA Stennis Space Center, MS
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Mercury Surface Space ENvironment, GEochemistry, and Ranging
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MESSENGER
http://www.messenger-education.org/main/epo.php
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Mercury Surface Space ENvironment, GEochemistry, and Ranging
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What subject do you teach?
Poll #2
A. Physics
B. Chemistry
C. Biology
D. Earth/Space Science
E. General Science
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ePD Overview
• What this NASA lesson teaches and where you can find it
• Preparation required for the lesson
• Suggestions for teaching the concepts and presenting the lesson
– How to introduce the lesson
– Performing the experiment
– Analyzing the results
• Resources and support for implementation
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Mercury Surface Space ENvironment, GEochemistry, and Ranging
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Lesson Concepts
• Radiation from the Sun is the main source of energy on Earth. It heats the Earth to a temperature at which life is sustainable.
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Lesson Concepts
• Radiation from the Sun is the main source of energy on Earth. It heats the Earth to a temperature at which life is sustainable.
• Heat can be transmitted via conduction, convection, and radiation.
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Lesson Concepts
• Radiation from the Sun is the main source of energy on Earth. It heats the Earth to a temperature at which life is sustainable.
• Heat can be transmitted via conduction, convection, and radiation.
• Heat interacting with material causes it to change temperature, size, or physical state (phase).
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Lesson Concepts
• When designing a scientific experiment, it is important to consider possible sources of error and improve the basic design to reduce these errors.
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Lesson Concepts
• When designing a scientific experiment, it is important to consider possible sources of error and improve the basic design to reduce these errors.
• In designing devices to be used in practical applications, it is important to take into consideration the cost-effectiveness of the device: the efficiency of the device in solving the problem compared with its total cost.
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Lesson Concepts
• When designing a scientific experiment, it is important to consider possible sources of error and improve the basic design to reduce these errors.
• In designing devices to be used in practical applications, it is important to take into consideration the cost-effectiveness of the device: the efficiency of the device in solving the problem compared with its total cost.
• Problems involving heat flow and temperature changes can be solved using known values of specific heat and latent heat of phase change.
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Check for Understanding
• What does the lesson teach?
• Where can you download the educator guide?
✓= I can answer these questions
✘ = I need clarification
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Cooling with Sunshades
3-day physics lesson
Grades 9-12
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Review this!
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Materials
2 Per Group
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Preview and Download Videos • Located in the NES Digital Playlist for this ePD
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Make Copies! Day 1
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Day 2
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Let’s pause for questions from the audience.
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Cooling with Sunshades
3-day physics lesson
Grades 9-12
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• Introduce the Mercury MESSENGER mission
• Video and Information sheet
• Assess prior knowledge
• Divide students into groups of 3 to design and plan their sunshade
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Video 1
• 3 minute 50 second video called, Extra: Mission to Mercury from the NASA Explorer School Website Video Collection under MESSENGER: Cooling with Sunshades
• Excerpt 1 on the on demand ePD playlist
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Raise your hand to answer!
1. What year did the mission launch?
2. When will it go into Mercury’s orbit?
3. What does MESSENGER stand for?
4. How many years has it been since we last
visited Mercury?
5.What is the biggest problem with sending a
spacecraft to Mercury?
6.What questions is MESSENGER trying to
answer?
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TWO SPACECRAFT
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TWO SPACECRAFT
TWO SETS OF DELICATE INSTRUMENTS
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TWO SPACECRAFT
TWO SETS OF DELICATE INSTRUMENTS
ONE GIANT FUSION REACTOR IN THE SKY…
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TWO SPACECRAFT
TWO SETS OF DELICATE INSTRUMENTS
ONE GIANT FUSION REACTOR IN THE SKY…
ONLY 1 THING TO PREVENT CATASTROPHE!
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TWO SPACECRAFT
TWO SETS OF DELICATE INSTRUMENTS
ONE GIANT FUSION REACTOR IN THE SKY…
ONLY 1 THING TO PREVENT CATASTROPHE!
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INSULATION DEPOT
• Aluminum Foil
• Bubble Wrap
• Air Pocket
• Filter Paper
• Mylar
• Can Lid
• Adhesive (tape)
• Transparency Film
$ 0.20
$ 0.25
$ 0.10
$ 0.03
$ 0.50
$ 0.15
$ 0.35
$ 0.05
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Instrument Fly-by
• http://messenger.jhuapl.edu/the_mission/movies/IntrumentFlyBy.mpg
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Post other ideas for materials in the chat room!
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• Pass out Worksheet 2 and review procedure for experiment and their designs
• Students build their sunshades
• Students follow instructions 1-11, collecting data on page 3
• Students work on pages 5-7 while waiting for ice in control can to melt (~30 minutes)
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Where would your students perform the investigation?
A. In my classroom or lab with lamps
B. Outdoors
C. I don’t have the resources to implement this lesson
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Let’s pause for questions from the audience.
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Depending on the level of your class…
Basic Homework:
• Compare ice melted in each can.
• How much ice was protected by your sunshade?
• What percent of ice was protected by the shade / cost of the shade?
• Complete p 5, questions 1-5.
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Depending on the level of your class…
Advanced Homework:
• Complete calculations on page 4 using data from the experiment.
• SHOW ALL YOUR WORK!
• In the next class you will compare your answers with your group and among groups.
• Complete p 5, questions 1-5.
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Students calculate: • angle of sun (trig)
• surface area (geom)
• latent heat (calc)
• energy/time
• energy/time/surface area
What do you mean by “advanced”?
And must confidently: • convert SI units
• use Joules
• avoid careless errors
• units, units, UNITS
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Use the pencil to mark the skills your students would NOT be able to do:
calculate angle of sun (trig)
calculate surface area (geom)
calculate latent heat (calc)
calculate energy/time
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Use the pencil to mark the skills your students WOULD be able to do:
convert SI units
use Joules
avoid careless errors
be consistent with units, units, UNITS
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• Compare amount of ice melted in each can.
• How much ice was protected by your sunshade?
• What percent of ice was protected by the shade / cost of the shade?
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Mass of Ice
Shade Can
Beginning: 150 g
End: 80 g
Difference: 70 g
Control Can
Beginning: 147 g
End: 50 g
Difference: 97 g
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Control – Shade
Control
97g – 70g
97g
27.85%
x 100%
x 100%
Efficiency
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Cost-Efficiency (%/$)
Example sunshade: •2 foil layers •2 transparencies •2 bubble wrap layers •2 filter papers •1 can lid For a total of $0.88
Cost-Efficiency = 27.85% / $0.88 = 31.6% per dollar spent
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Lesson Wrap Up, pp 3-7
•Experiment design and sources of error •Heating curve of water •Passive vs. active cooling •Design improvements •Link to MESSENGER
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Let’s pause for questions from the audience.
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• Compare amount of ice melted in each can.
• How much ice was protected by your sunshade?
• What percent of ice was protected by the shade / cost of the shade?
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Surface Area of Can Lid
Known: 9.2 cm diameter
4.6 cm radius = .046 m
A = 3.14 (.046m) 2
A = .0066m 2
A = .007 m 2
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Mass of Ice
Shade Can
Beginning: 150 g
End: 80 g
Difference: 70 g
.07 kg
Control Can
Beginning: 147 g
End: 50 g
Difference: 97 g
.097 kg
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Energy Used
Shade Can
Q = mL
Q = m (334 kJ/kg)
Q = .07 kg (334 kJ/kg)
Q = 23.38 kJ
Control Can
Q = mL
Q = m (334 kJ/kg)
Q = .097Kg (334 kJ/kg)
Q = 32.398 kJ
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Energy/Time Used (2400 seconds)
Shade Can
23.38 kJ = 23,380 J
2,400 s
= 9.74 J/s
Control Can
32.398 kJ = 32,398 J
2,400 s
= 13.5 J/s
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Energy/s/Unit Area (J/s/m2)
Shade Can
9.74 J/s
.007 m2
= 1,391.43 J/s/m2
Control Can
13.5 J/s
.007 m2
= 1,928.57 J/s/m2
= =
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Energy/Time to Calculate % of Energy Shade Kept Away
Control – Shade
Control
13.5 J/s – 9.74 J/s
13.5 J/s
27.85%
x 100%
x 100%
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Cost-Efficiency (%/$)
Example sunshade: •2 foil layers •2 transparencies •2 bubble wrap layers •2 filter papers •1 can lid For a total of $0.88
Cost-Efficiency = 27.85% / $0.88 = 31.6% per dollar spent
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COST-EFFICIENCY
• NASA engineers have to meet budget constraints in their designs
• New model for NASA engineers is to use “off-the-shelf” technology
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Lesson Wrap Up, pp 3-7
• Experiment design and sources of error
• Heating curve of water
• Passive vs. active cooling
• Design improvements
• Link to MESSENGER
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NASAExplorerSchools Where can you find more?
http://explorerschools.nasa.gov
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NASAExplorerSchools
Search for: NASA Explorer Schools On Facebook. Follow us on Twitter: @NASAExplorerSch
Collaboration Making Teaching Easy
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Share Your Experience http://neon.intronetworks.com
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Get Your Credit
Tell Us What You Think! Take the Product Survey Take the Electronic Professional Development Survey
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NASA Explorer Schools Research Workshops
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The Goldstone Radio Telescope opportunity opened my eyes to the reality that my 6th grade students can conduct real scientific research using a HUGE NASA
resource! Another amazing opportunity provided by NES that has changed the way I teach science and math.
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NES recognizes teachers who: •Integrate NES materials into the curriculum.
•Use NES materials to engage their students in STEM.
•Use technology to enhance STEM.
•Involve families in STEM activities.
•Engage the community.
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Let’s pause for questions from the audience.
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Thanks to today’s presenter!
Thanks to today’s presenters
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Steve Culivan NASA Stennis Space Center, MS
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Thank you to the sponsor of today’s web seminar:
This web seminar contains information about programs, products, and services offered by third parties, as well as links to third-party websites. The presence of a listing or
such information does not constitute an endorsement by NSTA of a particular company or organization, or its programs, products, or services.
Thanks to today’s sponsor
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Thanks to NSTA administration
National Science Teachers Association
David Evans, Ph.D., Executive Director
Al Byers, Ph.D., Acting Associate Executive Director, Services
NSTA Web Seminar Team
Flavio Mendez, Senior Director, NSTA Learning Center
Brynn Slate, Manager, Web Seminars, Online Short Courses, and Symposia
Jeff Layman, Technical Coordinator, Web Seminars, SciGuides, and Help Desk
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