Sunday, November 1, 2009

i WAS wondering...



The Web site http://www.iwaswondering.org/ is inspired by Women's Adventures in Science, a biography series for middle-school-aged students co-published by the Joseph Henry Press and Scholastic Library Publishing. Women's Adventures in Science chronicles the lives of contemporary, working scientists. Despite their varied backgrounds and life stories, these remarkable women all share one important belief: the work they do is important and it can make the world a better place.

Each of the women profiled in the series participated in her book's creation by sharing important details about her life, providing personal photographs to help illustrate the story, making family, friends, and colleagues available for interviews, and explaining her scientific specialty in ways that will inform and engage young readers. The scientists also participated directly in the creation of the Web site.


The Web site is a project of the National Academy of Sciences intended to showcase the accomplishments of contemporary women in science and to highlight for young people the varied and intriguing careers of some of today's most prominent scientists. The site draws from and accompanies the publication of a ten-volume series of biographies entitled Women's Adventures in Science, co-published by the Joseph Henry Press (an imprint of the National Academies Press) and Scholastic Library Publishing.

Saturday, October 31, 2009

Happy Halloween!

Count the Black Dots


Did they disappear like ghosts when you tried to focus on them? A phenomenon called ”lateral inhibition” makes a bright surrounding area look darker, and vice versa. Spooky!

Friday, October 30, 2009

Carl Sagan Day 11/09

Carl Sagan Day

Announcing the First Annual Carl Sagan Day: A Celebration of Astronomy

WHAT: A celebration honoring the legacy the life and contributions of the great astronomer, author, and philosopher, Carl Sagan, on the 75th anniversay of his birth.

WHY: Carl Sagan was a Professor of Astronomy and Space Science and Director of the Laboratory for Planetary Studies at Cornell University. He served as an advisor and consultant to NASA, and played a major role in the establishment of SETI (Search for Extraterrestrial Intelligence). He was a Pulitzer Prize winning author and most familiar to the public through his COSMOS series on NOVA. In addition to numerous awards, recognitions and honorary degrees for his outstanding contributions, he is acknowledged as one of the most effective public faces of astronomy and space science throughout the world. Sagan died in December 1996.

WHEN: Saturday, November 7, 2009, 12 noon - 10:00 PM

WHERE: Broward College Central Campus, 3501 SW Davie Rd., Davie, FL 33314

HOW MUCH: The event is free to all! Activities is planned to take place include teacher workshops, children’s activities, showings of the COSMOS series episodes, food, magic shows, science displays, planetarium programs, telescope workshops, games, door prizes, star-gazing, and many surprises.

CONTACT: Carl Sagan Day

I was looking for an excuse to post this: Carl Sagan - 'A Glorious Dawn' ft Stephen Hawking (Cosmos Remixed). Enjoy!

Wednesday, October 28, 2009

Hoop Glider

ENGAGE
If you throw a plain straw, it doesn’t go very far. But when you add paper hoops, the straw glides through the air!

EXPLAIN
It’s because the hoops act like wings. Things that fly, like insects, birds, and airplanes all have wings. But wings are not all the same shape and size. Different wings can be better for different kinds of flight. For example, an eagle has long, wide wings that help it glide. An airplane has wings with small flaps that move up and down to turn the plane. Try changing the wings on your glider. How does it fly with different wings?

EXPLORE
What you need:
• Paper
• Ruler
• Scissors
• Pencil
• Tape
• Non-bendable, plastic drinking straw

What to do:
1.Cut two strips of paper. Make one strip 1 inch wide and 5 inches long. Make the second strip 1 inch wide and 10 inches long.
2.Curl each paper strip into a hoop. Tape the ends together. Now you have a big hoop and a small hoop.
3.Tape the small hoop to one end of the straw.
4.Tape the big hoop on the other end of the straw. Make sure the big hoop lines up with the small hoop.

ELABORATE
Newton's 3rd Law of Motion: For every action, there is an equal and opposite reaction.
Thrust is the force exerted when to throw a hoop glider.
Drag (or air resistance) is the reaction force against thrust. The more "stuff" there is, the harder it is to move that stuff through the air.
Lift is the force that keeps a hoop glider up in the air. The curved surface of the hoop glider's loops create a difference in pressure above and below the loops, which deflects the hoop up.
Gravity is the reaction force, pulling the glider down toward the center of the Earth.
Gravity is a constant and cannot be changed. But by maximizing lift, minimizing drag and with just the right amount and direction of thrust, hoop gliders can fly quite far!

EVALUATE
Hold your Hoop Glider in the middle of the straw, with the small hoop in front. Throw it gently like a spear. It might take some practice to get the hang of it. How far does your glider fly?

EXTEND
What will happen if . . .
• you make the straw smaller?
• you change the size of the hoops?
• you add a third hoop?
Choose one thing to change (that’s the variable), and predict what you think will happen, then test it!

Other websites to check out
Science Bob's The Incredible Hoop Glider
The Exploratorium's Science Explorer Hoopster
Museum of Science Hoop Glider Engineering
PBS Kids ZOOM Hoop Glider PDF

Tuesday, October 27, 2009

Bottle Rocket Seminar

Water Bottle Rocket Seminar

WHEN: SATURDAY, NOV. 7, 2009, CAFETERIA
8:00 am – 1:00 pm

WHERE: Don Estridge High Tech Middle School

1798 NW Spanish River Blvd.

Boca Raton, Florida 33431
Phone: (561) 989-7800

WHAT: Design a rocket around an ordinary 2 liter plastic soda bottle that stays in the air the longest possible time.

Science
• Thrust
• Newton’s laws
• Center of gravity/pressure
Technology
• Problem solving
• Design processes
• Construction processes
Engineering
• Prediction
• Technological design
• Modeling
Math
• Trigonometry
• Truncated cones
• Axial symmetry

WHAT SHOULD YOU BRING: (2) 2 LITER BOTTLES (PER STUDENT), PACKAGING TAPE, EASTER EGGS, PARTY HATS, DISPOSABLE PLATES (NOT CARDBOARD), PERMANENT MARKER, MEASURING TAPE OR RULER, SCISSORS, EXACTO KNIFE, AND EMPTY PAPER TOWEL ROLLS, NEWSPAPERS.

PRESENTED BY: PRATT AND WHITNEY

DIRECTIONS: FROM SOUTH—TAKE I95 NORTH TO YAMATO, GO WEST ON YAMATO TO MILITARY TRAIL, GO SOUTH ON MILITARY TRAIL TO SPANISH RIVER BLVD. TURN LEFT ON TO SPANISH RIVER BLVD. MAKE A SHARP RIGHT TO DON ESTRIDGE MIDDLE. FROM NORTH—TAKE I95 SOUTH AND FOLLOW THE DIRECTIONS ABOVE.

-----
10/29 UPDATE: Safety Concern
Palm Beach Post: Plastic bottle explodes in Palm Beach County boy's face as he tries to duplicate YouTube experiment

Safety is very important with any rocket. Rockets are safe when everyone understands and abides by safe behavior. Only plastic drink bottles should be used, and new bottles should be used whenever possible. Bottles should be retired from use after 10-15 launches.

CAUTION: Children should be closely supervised when they are using rockets. Even if they understand and agree to the safety rules, there will be lapses in concentration or judgment. Children cannot be made responsible for the safety of others. A child may feel it is enough to tell a two-year old to stay out of the way.

Launch Safety Instructions:
• Select a grassy field or athletic practice field that measures at least 30 meters in width. Place the launcher in the center of the field and anchor it in place. (If it is a windy day, place the launcher closer to the side of the field from which the wind is blowing so that the rocket will drift onto the field as it descends.)
• As you set up your rocket on the launch pad, observers should stand back several meters. It is recommended that you rope off the launch site.
• Do not point your water rocket at another person, animal, or object. Water rockets take off with a good deal of force from the air pressure and weight from the water.
• The team member responsible for pumping air into the rocket should wear eye protection. The bottle rocket should be pumped no higher than about 50 pounds of pressure per square inch, but never above 90 psi. Before launching, consult the following table provided for coaches in the SECME Olympiads:

Table of Distances for a Given Pressure

Pressure ----- Typical Classroom Maximums
20 psi ----- 26 meters
40 psi ----- 51 meters
60 psi ----- 77 meters
80 psi ----- 102 meters

• When pressurization is complete, everyone should stand in back of the roped off area for the countdown. Two-liter bottles can weaken and will explode. Bottles should be retired from use after 10-15 launches.
• Continue to countdown and launch the rocket only when the recovery range is clear.
If you do not experience successful liftoff, remember that the bottle is pressurized and may blast off when you touch it. Be careful; do not let it hit you. Never stand over the rocket. A team member should retrieve the rocket.

Monday, October 26, 2009

Sir Isaac Newton

by David Arns

Under a spreading apple tree,
The village genius stands;
His mind conceives of wondrous things,
He writes them with his hands;
His fame goes forth to all the world--
He's known in many lands.

A tiny babe on Christmas Day
in 1642
Was born to Mrs. Newton
while outside, the cold winds blew.
And on the farm, through childhood,
precocious Isaac grew.

And after chores, he built devices
to see just how they worked,
To see what laws of nature
underneath the workings lurked.
(When people called them "toys," that's what
got Isaac really irked.)

His mother saw he was no farmer,
sent him off to school;
He quickly showed at Cambridge
that he was nobody's fool:
He began to bring to light the laws
that all of nature rule.

In one chapter in his story
(though apocryphal, it's said),
An apple, falling from a tree
impacted on his head,
Which drew his thoughts to gravity,
and we all know where that led.

He wondered if, by any chance,
the self-same gravitation
That pulls an apple to the ground,
affected all creation:
The moon, the planets, and the sun. . .
Thus went his cogitation.

He determined that the gravity
of earth indeed controls
The orbit of our moon, as 'round
the earth it ever rolls.
Now, describing it mathematically
was one of Newton's goals.

He discovered that the math you need
to show the laws of nature,
Surpassed the knowledge of that day;
the cosmos' legislature
Required new math, so Newton wrote
his "fluxions" nomenclature.

He talked of falling bodies
and his famous Laws of Motion,
And of colors seen in bubbles
and the tides upon the ocean.
And his crowning jewel, "Principia,"
created great commotion.

Yes, Newton's brilliant mind, it was
a trunk with many twigs--
His mind branched out in every way
(right through his powdered wigs).
His greatest contribution, though,
was cookies made from figs.

Sunday, October 25, 2009

He Fixes Radios by Thinking!

The 2009-10 SECME theme for the national student competition is "SECME: Igniting Minds Through STEM Education."

In the Essay competition, Phase I is an interest inventory. What makes you smile, gets you excited, makes you want to "do" something? What SECME activities do find to be fun? Why are they fun for you? How can you make a living doing what you enjoy? What kinds of jobs are there? What kind of education do you need to prepare you for these jobs?

Saturday, October 24, 2009

STEMinar at Seminole Ridge High School

S.T.E.M.inar at Seminole Ridge High School

Saturday, December 12, 2009
8:30 am – 1:00 pm


Attention: SECME students and school coordinators!
Join master teachers, proud parents and creative community engineers to work on Olympiad projects. Build and break bridges; blast off bottle rockets; blueprint your banners; and battle in the brain bowl!

Register online at
http://tiny.cc/m9vDR
Email questions to Erich Landstrom at SeminoleSECME[at]gmail[dot]com

Please bring any existing Olympiad submission which you would like to receive assistance. Bring any necessary supplies (such as balsa wood, glue, etc.) for projects that you want to start that day.

Directions to Seminole Ridge High: Travel west on Southern Blvd. (SR 80, or Route 441), or Okeechobee Blvd to Seminole Pratt Whitney Road. Turn north. School on west, across from Callery Judge Grove, before Winn-Dixie plaza.

Friday, October 23, 2009

When I Heard the Learn'd Astronomer & Sky

The 2009-2010 SECME theme is "Igniting Minds Through STEM Education." As you read the two poems below, contrast the poet of "When I Heard the Learn'd Astronomer" with the poet of "Sky." Which poet has a mind ignited by STEM education?

When I Heard the Learn'd Astronomer

When I heard the learn'd astronomer,
When the proofs, the figures, were ranged in columns before me,
When I was shown the charts, the diagrams, to add, divide,
and measure them,
When I sitting heard the learned astronomer where he lectured with
much applause in the lecture room,
How soon unaccountable I became tired and sick,
Till rising and gliding out I wander'd off by myself,
In the mystical moist night-air, and from time to time,
Look'd up in perfect silence at the stars.

Poet: Walt Whitman (Books by Walt Whitman)
Poem: 5. When I heard the Learn’d Astronomer.
Volume: Leaves of Grass - 15. Songs of Parting
Year: Published/Written in 1900


--------------------

Sky

See the wonders of the sky--wondrous sky!
Astronomic marvels everywhere do meet the eye!
They are waiting, waiting, waiting
for us just to take a glance,
And behold them in their splendor,
Filled with awe that they engender,
as we gaze in dreamlike trance;
And we stare, stare, stare
through the icy winter air,
And are dazzled at the glory
of the heav'nly inventory
Of the sky, sky, sky, sky, sky, sky, sky--
At the heav'nly inventory of the sky.
See the mighty galaxies--galaxies!
Twinkling at us shyly through the branches of the trees.
How they shimmer, shimmer, shimmer
(or it so appears to us),
But their distance is enormous,
So astronomers inform us:
Some, a billion light-years plus.
But they shine, shine, shine,
with a radiance benign,
That belies the brilliant, blinding,
awful glare that we'd be finding,
Were we near, near, near, near, near, near, near--
The glare that we'd be finding, were we near.

Think about exploding stars--dying stars,
Throwing through the heavenlies their luminescent scars.
See them glimmer, glimmer, glimmer
with a wispiness of light
From their tendrils filamental
Made from gases elemental
in the darkness of the night,
Reaching out, out, out,
on their interstellar route
Leaving light-years far behind them
where the gravity confined them
In the stars, stars, stars, stars, stars, stars, stars--
In the fusion-heated centers of the stars.

Or think about our neighborhood--our neighborhood!
We have asteroids and planets to explore (and yes, we should).
They are spinning, spinning, spinning
as they orbit 'round the sun,
And their paths, which are elliptic,
All are close to the ecliptic
As they make their annual run.
They go round, round, round,
Yet, in vacuum, make no sound,
But continue their rotation,
their precession and nutation
Through the years, years, years, years, years, years, years--
They continue their rotation through the years.

Poet: David Arns
Poem: Sky
Volume: March 1998 issue of "The New Zealand Science Monthly", March/April 1999 issue of "Quantum Magazine".
Year: 1997

Wednesday, October 21, 2009

Seminole SECME schedule, Winter 2010

Schedule subject to change

W, 10/21 - MTVs technical report & drawing
Sa 10/24 - Saturday SECME Seminar: Tech Rpt & Drawings
W, 10/28 - Tech rpt writing in Media Center
W, 11/4 - Water bottle rocketry construction
Sa, 11/7 - Saturday SECME Seminar: rocket construction
W, 11/11 - NO meeting
Sa, 11/14 - Engineering Family Fun Day
Tu, 11/17 - blood drive “Give Blood: It’s Not Rocket Science”
W, 11/18 - Water bottle rocketry
W, 11/18 - SECME Coordinator Meeting 4:30 PM
Th, 11/19 - Business Bash & Open House for Class of 2014
Tu, 11/24 - Fizzix Funday (Launch It: water bottle rockets with egg payload)
W, 12/2 - Rocket refinement
W, 12/9 - Rocket technical drawing
Sa, 12/12 - Saturday SECME Seminar: Seminole Ridge
W, 12/16 - Rocket technical drawing refinement