Transcript Where do chemical elements come from?

Where do chemical elements
come from?
How are these
two pictures
related?
How to fold your paper…
• Hold the paper
lengthwise and fold the
edges into the center.
• Flip the paper over and
write Agree or Disagree
at the top.
• Number 1-5 down the
paper.
Agree or Disagree
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Agree or
Disagree
1) All stars
form iron in
their cores.
Agree or Disagree
2) The hydrogen
nucleus is the
most stable
nucleus in
nature.
Cosmicteaparty.org
Agree or Disagree
3) The type of elements produced by a
star depends on the temperature and
pressure of its core.
Agree or
Disagree
4) All of the
elements on
Earth, except for
hydrogen, were
formed in the
interiors of stars.
Agree or Disagree
5) Our sun contains a very small
number of gold atoms.
Elements
How they are formed
(Use bullets or number each step.)
Elements up to and including iron
What elements are formed by
stars less massive than our sun?
What elements are formed by
stars having a mass of one to eight
suns?
What elements are formed by
stars having a mass greater than
eight suns?
“s” process:
Elements heavier than iron
“r” process:
“p” process:
Questions
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Questions:
1. What chemical element is the
primary constituent of a young
star?
2. Name the astrophysicist who first
advanced the idea that the
chemical elements originated from
hydrogen in stars.
3. Name the stellar process in which
the fusion of hydrogen produces
other elements.
Questions
4. Why is iron the heaviest
element that can be produced
in stars?
5. What are the two opposing
forces at work as fusion takes
place in stars?
6. What name is given to the
explosion of a star?
Questions
7. Neutron capture produces
what kind of elements in a
star?
8. Name the material sent into
space by a supernova.
9. What does a spectroscope do
to light?