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 Disagree1

2

3

4

5

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?

Elements heavier than iron

“s” process:

“r” process:

“p” process:

Questions

1 4 7

2 5 8

3 6 9

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.

Questions4. 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?

Questions7. 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?