# Stars lab

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Stars lab
Galaxies
Distance: Uninflated balloon
(inches or centimeters)
Distance: ¼ full (inches or centimeters)
Distance: ½ full (inches or centimeters)
Distance: ¾ full (inches or centimeters)
A to B
3.5
5
9
13
A to C
4
4
9
13.5
A to D
3.5
5.5
12
17.5
B to C
4
4
8.5
13
B to D
2
2.5
5
7.5
C to D
3
3.5
5.5
10.5

Analysis:
Answer the following questions in complete sentences. Include the answers in theAnalysis and Conclusion section of your lab report.
1. How does the density and distribution of your “stars” change as the balloon expands?
When the balloon is not inflated, the “stars” are closer together. Thus, they are denser. When the balloon is blown up, the universe is bigger, making the stars less dense.
2. Compare and contrast your experimental procedures with the Big Bang theory. How does your balloon represent the Big Bang theory? What are the shortcomings of the experimental design?
The balloon expands, making the universe bigger. This is like the big bang theory in the way that the universe expands to create what it is today. One of the shortcomings is that the balloon can only get so big, while the universe has no limits.
3. How does the model you created help to show that the Steady State theory is inaccurate?
The model does not create new matter, it only expands existing matter.
4. Suggest a way that a scientist could create an even more accurate model of the Big Bang theory.

5. What will happen to the gravitational force between stars as the universe continues to expand?
It will not change

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