Wednesday, February 29, 2012
Sunday, February 26, 2012
SONG: I'm Atoms by Veritasium
LYRICS:
Well an atom's made of protons, neutrons, and electrons
the first two in the nucleus, the third around it
it's mostly empty space, but it feels solid in any case
The elements are all the different types of atoms
they differ by the number of protons in the middle.
Hydrogen has only one, but Uranium has a ton
It's just chemistry that you and me are made of these atoms
Well atoms bond together to form molecules
Most of what's surrounding me and you
Water, sugar, things yet undreamed of of of of
Look around you, see the combinations in a eucalypt tree
Mendeleev's periodicity
gives us sand and water and the air above ove ove ove ove
It's just chemistry that you and me are made of these atoms:
Hydrogen, Oxygen, Carbon, Nitrogen, make up the world's life forms
Do do do you, do do do do
but do you wonder how
matter forms something strange
when there's a chemical change?
Where did these atoms come from? They were fused in stars
Light elements combine releasing light from afar
Fusion in the sun, creates Helium
I guess what I be saying is you gotta use your reason
To open up your mind and see the cause of the seasons
-How do we know what's true? The scientific method shows you
It's just chemistry that you and me are made of these atoms
Atoms bond together to form molecules
Most of what's surrounding me and you
Water, sugar, sand and you'll find things undreamed of
So Argon, Neon, Xenon
There's no need to overstate
'Cause we are of course
This, of this, of this, we're made: atoms
VIDEO: Is There Gravity In Space? by Veritasium
If you've seen footage from the International Space Station or any of the space shuttle missions, you know that astronauts float around as they orbit the Earth. Why is that? Is it because the gravitational force on them is zero in space? (Or nearly zero?) The truth is that the strength of the gravitational attraction is only slightly less than it is on Earth's surface. So how are they able to float? Well, they aren't floating - they're falling, along with the space station. They don't crash into the Earth because they have a huge orbital velocity. So as they accelerate towards the Earth, the Earth curves away beneath them and they never get any closer. Since the astronauts have the same acceleration as the space station, they feel weightless. It's like being in a free-falling elevator (without the disastrous landing).
SONG: Experiments A Cappella by Veritasium
LYRICS:
Experiments are how we test theories
And further the progress of science
There are many theories to compare
Experiments help us find the best one
Saturday, February 25, 2012
SONG!: Gravity by Veritasium
LYRICS
Gravity is working with me
And Gravity, keeps me on the ground
All mass attracts all other mass
a force proportional to mass one and two
and inversely to the distance between them squared
Oh, gravity is working with me
and gravity, makes apples fall to ground
Oh twice the mass has twice the pull
but the force on each is still equal
It keeps the moon and the satellites
going round
Oh twice the mass has twice the pull
but the force on each is still equal
It keeps the moon and the satellites
going round
Oh gravity, the force that makes weight on me
Woah, gravity, now general relativity (how can that be?)
The force between us all is
The force between us all is
The force between us all is
Gravity between us all is
Gravity between us all is
Gravity between gravity between us all is
link to video on YouTube
And Gravity, keeps me on the ground
All mass attracts all other mass
a force proportional to mass one and two
and inversely to the distance between them squared
Oh, gravity is working with me
and gravity, makes apples fall to ground
Oh twice the mass has twice the pull
but the force on each is still equal
It keeps the moon and the satellites
going round
Oh twice the mass has twice the pull
but the force on each is still equal
It keeps the moon and the satellites
going round
Oh gravity, the force that makes weight on me
Woah, gravity, now general relativity (how can that be?)
The force between us all is
The force between us all is
The force between us all is
Gravity between us all is
Gravity between us all is
Gravity between gravity between us all is
link to video on YouTube
VIDEO: Newton's 3rd Law by Veritasium
There is a gravitational force of attraction between the Earth and the moon, but is it mutual? That is, are the forces on the Earth and the moon equal? Most people would say no, the Earth exerts a greater force of attraction because it is larger and has more mass. This is a situation in which Newton's Third Law is relevant. Newton's Third Law says that for every force, there is an equal and opposite reaction force. So the force the Earth exerts on the moon must be exactly equal and opposite the force the moon exerts on the Earth. But how can that be - that the same size force keeps the moon orbiting, but barely affects the Earth? The answer is inertia - the tendency for all objects with mass to maintain their state of motion. Since the Earth has much more mass than the moon, it has greater inertia and therefore experiences much less acceleration for the same amount of force.
link to video on YouTube
SONG!: What Is Electricity by Veritasium
LYRICS
1, 2, 3 A song about 'lectricity
because it powers our lives
makes it possible for us to thrive
because it powers our lives
makes it possible for us to thrive
Oh, 4, 5, 6, volts of potential difference
makes electrons go round
if the circuit is complete and sound
Circuit's closed
Voltage There
Current Flows
Power Everywhere
We use AC,
in factories
and homes because we can transform it
High voltage
transmits with lower loss
but low voltage is best for safety
I said what is electricity?
Well, so 1,2,3 a song about 'lectricty
because it powers our lives
makes it possible for us to thrive
because it powers our lives
makes it possible for us to thrive
Oh, 4,5,6 volts of potential difference
makes electrons go round if the circuit is complete and sound
Heat makes steam
turns turbines
and a magnet in
coils of wires
We use AC,
in factories
and homes because we can transform it
High voltage
transmits with lower loss
but low voltage is best for safety
I said what is electricity?
Oh yeah, Oh yeah, C'mon!
How'd it be
no energy
of the electrical persuasion
I know we'd
have no computers
no internet or mobile phones yeah
Powers the world
Makes the world
We need electricity yeah
VIDEO: Scale Model of the Earth and Moon by Veritasium
If the Earth were a basket ball and the Moon a tennis ball, about how far apart would the balls need to be to accurately represent the distance between the Earth and Moon with a scale model?
Thursday, February 23, 2012
Saturday, February 18, 2012
Friday, February 17, 2012
SONG!: Mr. Lincoln
LYRICS
Mr. Lincoln, who were you?
Honest Abe please tell me true
Why do we remember you?
Why do we remember you?
Can you tell me?
Long and lanky, really tall,
Long and lanky, really tall,
All the way to 6 foot 4,
Stern look, strong back,
Stern look, strong back,
Black top hat
Mr. Lincoln
you got me thinking
about your role in history
It's Presidents Day
It's Presidents Day
so happy birthday
from a grateful free country.
1809 when you were born
one room cabin for your home
Kentucky first
Kentucky first
and then you moved to Indiana
You walked for miles to borrow books,
used your axe for splitting wood
ran a store, went to war,
ran a store, went to war,
and studied law
Mr. Lincoln
you got me thinking
about your role in history
It's Presidents Day
It's Presidents Day
so happy birthday
from a grateful free country.
Our president through civil war,
our country torn apart for sure,
Keep the union, free the slaves,
Keep the union, free the slaves,
Emancipation.
North and South a deep divide,
North and South a deep divide,
at Gettysburg where soldiers died
you called us all to unify
you called us all to unify
United States!
Mr. Lincoln
you got me thinking
about your role in history
It's Presidents Day
It's Presidents Day
so happy birthday
from a grateful free country.
We see your face,
It’s carved into Mount Rushmore
A marble statue is part of your memorial
You're on our pennies, and our five dollar bills
A marble statue is part of your memorial
You're on our pennies, and our five dollar bills
And on a ship that serves us still!
By 65 the war was won
the civil war was gone and done
John Wilkes Booth took his gun
John Wilkes Booth took his gun
and killed Abe Lincoln
The greatest of our statesmen gone
The greatest of our statesmen gone
his legacy lives on and on
In freedom an equality for you and me
In freedom an equality for you and me
Mr. Lincoln
you got me thinking
about your role in history
It's Presidents Day
It's Presidents Day
so happy birthday
from a grateful free country.
SONG!: The First Five Presidents
LYRICS
Do you know who were the first five presidents?
Can you tell me because I’d like to know?
Do you know who were the first five presidents?
What did they do to help our nation grow?
George Washington was number 1
He had the British on the run
So let’s clap now for George Washington
Do you know who were the first five presidents?
Can you tell me because I’d like to know?
Do you know who were the first five presidents?
What did they do to help our nation grow?
Then John Adams number 2
A peace negotiator true
George Washington was number 1
He had the British on the run
Wave your flag now for George Washington
Do you know who were the first five presidents?
Can you tell me because I’d like to know?
Do you know who were the first five presidents?
What did they do to help our nation grow?
Thomas Jefferson number 3
Bought more land for you and me
Then John Adams number 2
A peace negotiator true
George Washington was number 1
He had the British on the run
So salute now for George Washington
Do you know who were the first five presidents?
Can you tell me because I’d like to know?
Do you know who were the first five presidents?
What did they do to help our nation grow?
James Madison was number 4
He made us stronger than before
Thomas Jefferson number 3
Bought more land for you and me
Then John Adams number 2
A peace negotiator true
George Washington was number 1
He had the British on the run
Let’s have fireworks now for George Washington
Pop! Bang!
Do you know who were the first five presidents?
Can you tell me because I’d like to know?
Do you know who were the first five presidents?
What did they do to help our nation grow?
James Monroe was number 5
He made good feelings come to life
James Madison was number 4
He made us stronger than before
Thomas Jefferson number 3
Bought more land for you and me
Then John Adams number 2
A peace negotiator true
George Washington was number 1
He had the British on the run
So let’s clap now for George Washington
Let’s salute now for George Washington
Let’s give a cheer now for George Washington
Hoo-ray!
What are you doing to celebrate GW's B-day?
Free Admission at Mount Vernon on Monday, the 20th of February
Ms. Bragg is planning to go to the 2pm Battle Re-enactment at Fort Ward on Sunday the 19th. Hopefully, the weather cooperates!
Monday, February 13, 2012
Random Acts of Kindess Week
Thursday, February 9, 2012
2012 Student Photo and Video Contest
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Criteria for an award: A body of work (five photographs) or a video presentation that are recognizable as having been taken in the City of Falls Church and represent the hometown qualities of Falls Church City. This could include events, landmarks, people, nature and other visual opportunities that represent the best of Falls Church City and the artistic qualities that Bob Morrison captured in his photographs.
Entry Deadline: All entries must be received by 5:00 p.m. on Monday, April 23, 2012.
$50 first place still photography K-6
$50 first place for a short video K-6
Click here for more details.
Here's a short promo for the contest:
Wednesday, February 8, 2012
Tuesday, February 7, 2012
Monday, February 6, 2012
Xtra Math Parent Orientation
If you only have time to watch some of these, please watch the second two-- About the XtraMath Student Activities and About the XtraMath Progress Reports. They really demonstrate how powerful this program is.
To go directly to the XtraMath website click here.
XtraMath Overview from XtraMath on Vimeo.
Getting Started with XtraMath -- for Parents from XtraMath on Vimeo.
About the XtraMath Student Activities from XtraMath on Vimeo.
To go directly to the XtraMath website click here.
XtraMath Overview from XtraMath on Vimeo.
Getting Started with XtraMath -- for Parents from XtraMath on Vimeo.
About the XtraMath Student Activities from XtraMath on Vimeo.
Practice Has Begun for World Education Games 2012
This year there are 3 game days:
World Spelling Day on March 6th
World Maths Day on March 7th
and World Science Day on March 8th
Click here to go to the World Education Games site.
Then click on the tab in the top right hand corner (see screenshot with arrow below) to sign in.
What is the Young Scientists Challenge?
There you can watch some short videos about the challenge and learn more.
Ms. Bragg especially likes: Voyage of Ideas, The Anatomy of a Challenge, and Why Science?
Friday, February 3, 2012
Thursday, February 2, 2012
Star Math Test Today! Show us what you know!
Click on the Star Math logo to go to the sign-in page.
REMEMBER: This test will probably be harder than other math tests you have taken. That is because STAR Math selects questions just for you to see how much you know about math. You will probably even see math concepts or problems that you have never been taught in school. This is normal for how this special type of test works. Try not to get frustrated by this. Just try to give the best answer to each problem and you will do fine.
Do not worry if someone finishes the test before you because every test is different. Do not worry about how many questions you think you get right, or how many you get wrong. Everyone will probably miss some of the questions. The main goal is for you to do the best you can.
Have fun, and do your best!
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