History of Winter

History of Winter

History of Winter

Let’s Get Started!

NES Educator:BrendaVan Dyke

History of Winter

It’s been a great week!

History of Winter

Introduction

• Goals of Web Seminar:Snowflake taxonomy & classification

• Meet the scientists forThe History of Winter:

• Dr. Peter Wasilewski• Eric Erbe

History of WinterDr. Peter Wasilewski

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Dr. Peter Wasilewski in Antarctica

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Eric Erbe and his Scanning Electron Microscope

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The Secret of Snow: Discover-February 2004

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Low Temperature Scanning Electron Microscope

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NES Educators:• Tim Hart• Joe Cote

Solar System Ice

History of Winter

Solar System Ice

• Winter on other planets

• Ice Formation on Earth and Mars

• Ice Formation Demonstration

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Solar System Ice

Question 1:Do you think you can have winter with ice on the lakes and snowflakes in the sky on all the other planets?

A. Yes

B. No

History of Winter

Solar System Ice

Question 2:How do you think winter will vary on Mars versus Earth?

A. Ice will be colder on Mars

B. Ice will vary in color on planets

C.Ice will vary in size on planets

D.Ice will vary in shape on planets

E. Ice will be made from different stuff

History of Winter

Solar System Ice

History of Winter

Solar System IceQuestion 3: What is different about these images?

Use your chat window to respond to us!

History of Winter

Solar System Ice

Question 4: Which do you think would simulate Martian frost? A or B?

A B

History of Winter

Solar System Ice

Ice Formation

Live Demonstration

History of Winter

Solar System Ice

History of Winter

Solar System Ice

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Solar System Ice

Looking through Dry Ice tank and seeing water ice in the background

History of Winter

Solar System Ice

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Solar System Ice

History of Winter

Solar System Ice

History of Winter

Solar System Ice

History of Winter

Local Snowflake Classification

NES Educators:• Kyan Thornton• Tammy Brown• Todd Hanson• Frannie Becquer

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Local Snowflake Classification

Question 5:Were you able to collect and observe your local snowflakes?

A. YesB. No

Use Yes/No button on the right of screen

History of Winter

Local Snowflake Classification

Question 6: Which of these do you think are snowflakes?

Use the drawing tools to mark your image. Don’t hit the erase button!

A B

C D

E F

G H

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Local Snowflake Classification

Hexagonal Plates

Stellar Plates

Hexagonal Columns

Needles

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Local Snowflake Classification

Spacial Dendrites

Capped Columns

Irregular Crystals

Graupel

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Question 7: What type of snowflake is this?

Local Snowflake Classification

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Question 7:What type of snowflake is this?A. Hexagonal PlatesB. Stellar PlatesC. Capped ColumnsD. Needles

Local Snowflake Classification

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Question 8: What type of snowflake is this?

Local Snowflake Classification

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Question 8:What type of snowflake is this?

A. Hexagonal PlatesB. Stellar PlatesC. Capped ColumnsD. Needles

Local Snowflake Classification

History of Winter

Question 9: What type of snowflake is this?

Local Snowflake Classification

History of Winter

Question 9:What type of snowflake is this?

A. Hexagonal PlatesB. Stellar PlatesC. Capped ColumnsD. Needles

Local Snowflake Classification

History of Winter

NES Educators:• Myra Bauer• Mary Tran• Mary Lara

What affects snowflake formation?

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What affects snowflake formation?

Question 10:Why do you think there are different types of snowflakes produced?

Use your chat window to talk back to us!

History of Winter

What affects snowflake formation?

Question 11:What might be some of the things that affect how a snowflake forms?

Use your chat window to talk back to us!

History of Winter

Use the drawing tools that appear in the next slide to place an “X” for your state.

Don’t hit the erase button, you’ll erase everyone’s marks!

What affects snowflake formation?

History of Winter

What affects snowflake formation?

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Question 12:

Thinking back to the map of the US, what is different about each school location and how might this affect snowflake formation?

What affects snowflake formation?

History of Winter

NES Educators:• Sue

Whiteside• Lisa Stoner

Graph analysis:Snowflake Formation

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Graph analysis:Snowflake Formation

Question 13:Which factors might have the biggest impact on snowflake formation?

A. Wind Speed B. TemperatureC. Daytime/NighttimeD. Amount of water in air

(humidity)

History of Winter

Graph analysis

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• Ice and winter exist on other planets in the solar system

• Ice on other planets may be very different then water ice of Earth

• There are different types of snowflakes on Earth that may be classified by a known taxonomy

• Two main factors affect snowflake formation:– Water content in air affects snowflake size– Temperature of air determines snowflake type

Today In Review

History of Winter

Thank You

Sincere thanks to those that helped in creating and delivering today’s NES program:

- Dr. Peter Wasilewski- Dr. Tony Gow- Eric Erbe- NASA Glen Research Center- Baker Communications- The NSTA Institute- NASA Explorer School Educators!

History of Winter

Join Tomorrow’sVideoconference and Webcast

Sharing HOW datawith studentsFriday, Feb. 201:00 PM –2:30 PM EST

http://howexcite.gsfc.nasa.gov