Transcript File

Big Bang Star Life
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Final Jeopardy
$100 Question from H1
How old do scientists think the universe is?
$100 Answer from H1
15 billion years
$200 Question from H1
List the three key pieces of
evidence for the Big Bang.
$200 Answer from H1
• Redshift (universe expansion)
• Quantity of light elements
• Cosmic Microwave Background
$300 Question from H1
How does the evidence of a Cosmic
Microwave Background support the
Big Bang theory?
$300 Answer from H1
The Big Bang was a large
explosion, and explosions are hot
for a while after they’re done. The
Cosmic Microwave Background is
the leftover heat throughout the
universe from the Big Bang.
$400 Question from H1
How do we know the
universe is expanding?
$400 Answer from H1
Galaxies appear to be red, which
means their lightwaves are stretched
out, which means they are moving
away from us. Everything appears
to be moving away from everything.
This means the universe is
expanding. This means that
everything must have been together
at one point.
$500 Question from H1
How does the quantity of
light elements support the Big
Bang theory?
$500 Answer from H1
The amount of light elements in the
universe is more than stars could
have possibly made. If the Big
Bang theory is true, the conditions
would have been right for these
elements to have been formed at the
beginning of the universe.
$100 Question from H2
How does a star begin to form?
$100 Answer from H2
Large groups of dust
condense due to gravity.
$200 Question from H2
What makes a star give off light
and heat. In other words, what
makes it shine?
$200 Answer from H2
Nuclear fusion
$300 Question from H2
What is a white dwarf?
$300 Answer from H2
The core of a dead star
that still retains some heat.
$400 Question from H2
What is a black dwarf?
$400 Answer from H2
The core of a dead star that has
cooled off.
$500 Question from H2
What does Miss Katrina think
is the coolest thing about
$500 Answer from H2
Everything around us was
formed inside of stars!
SIDE NOTE: If you don’t
think this is cool, you’re
$100 Question from H3
How does nuclear fusion begin?
$100 Answer from H3
Dust and gas particles
condense together, and the
intense heat and pressure
causes them to fuse.
$200 Question from H3
When two hydrogen atoms
in a star combine with
enough heat, pressure, and
speed, what happens? What
do they become?
$200 Answer from H3
They fuse and create a helium atom.
$300 Question from H3
Describe the constant battle going
on with in a star – think in and
$300 Answer from H3
Because of the mass, gravity
pushes in on the star. Fusion
of light elements releases
energy, which pushes out.
$400 Question from H3
Eventually elements with more
mass begin to fuse. This releases
more energy, and therefore more
“push” from the inside of the star.
How does this change the star?
$400 Answer from H3
The star expands, becoming a
red giant or supergiant.
One day our sun will run out of
hydrogen, expand, and burn up
the inner planets – including
$500 Question from H3
What is the fuel of a star
and what happens when it
runs out?
$500 Answer from H3
Hydrogen. Eventually only
heavy elements can be made,
the fusion of which does not
release energy. No more
explosions pushing out,
gravity wins, the star
$100 Question from H4
How old is the Earth?
$100 Answer from H4
4.54 billion years
$200 Question from H4
What are the inner planets made
of? What are the outer planets
made of?
$200 Answer from H4
Inner - rocky materials
Outer – gas and ice particles
$300 Question from H4
How are meteorites used to determine
the age of the Earth?
$300 Answer from H4
Earth rocks are not good for dating
because the rock cycle causes them to
change all the time. Since everything
in our solar system formed at about
the same time, scientists can find the
age of meteorites and infer that the
Earth is approximately the same age.
$400 Question from H4
How did the churning, moving,
spinning, rotating, revolving get
started in our solar system?
$400 Answer from H4
The movement caused by
the gravitational pull of the
formation of the star
disrupted everything,
causing everything to begin
to move.
$500 Question from H4
Describe how planets form.
$500 Answer from H4
As particles are moving around a
star, they’re moving approximately
the same speed, so when they
collide, it’s not destructive. They
stick together, gaining more mass,
thus gaining more gravity. They
attract more particles, and this
process continues – planets form.
$100 Question from H5
Who is the best teacher ever?
$100 Answer from H5
Miss Katrina
$200 Question from H5
What are you going to do tonight?
$200 Answer from H5
Study for my Earth Science test.
$300 Question from H5
What is the capital of Uganda?
$300 Answer from H5
$400 Question from H5
What were we showing when
we played with tuning forks?
$400 Answer from H5
We were showing sounds waves
because they behave like light
waves. We were showing the
Doppler Effect – the stretching of
waves as they move farther away.
$500 Question from H5
Why did we use prisms?
$500 Answer from H5
To show that light is broken into many
colors. Red light has a longer, more
stretched-out wavelength. Galaxies that
are moving away from us appear red.
This shows that the universe is expanding,
which supports the Big Bang theory.
Final Jeopardy
Describe the life cycle of a supermassive star.
Final Jeopardy Answer
Gas and dust condense
Nuclear fusion begins
Runs out of fuel.
Gravity takes over, star collapses.
Bounces back out in a huge explosion – supernova.
Dense core left over – neutron star.
Sometimes it becomes a black hole.