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# Expanding Universe Lab

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on 19 March 2014

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#### Transcript of Expanding Universe Lab

Expanding Universe Lab
Procedures:
1. Place an un-inflated balloon on the table. The balloon represents the universe. Use a marker to make small, filled in circles on the balloon. The circles represent the galaxies.
Analysis:
As the balloon expands, the distance between the dots or "galaxies" become greater.
Reflection Questions:
Compare and contrast your experimental procedures with the Big Bang Theory.
Reflection Questions:
Suggest a way that a scientist could create an even more accurate model of the Big Bang Theory.
Objective: To interpret a model demonstrating the theories of our expanding universe.
Hypothesis:
I think that as the balloon expands, the dots(galaxies) will spread apart and become more distant.
Materials:
One un-inflated balloon
Markers
About 30cm of string or yarn
Ruler or tape measure
2. Pick four of the circles around the balloon and label these A, B, C, and D.
3. Hypothesize what will happen to the distances between the labeled circles when you blow up the balloon 1/4 full, 1/2 full, and 3/4 full.
4. Measure the starting distances, in inches or centimeters, between each of the labeled galaxies.
5. Blow up the balloon about 1/4 of the way. Use a string to temporarily tie the balloon. Repeat the measurements between galaxies.
6. Untie the string. Repeat the same procedures by blowing up the balloon to 1/2, and 3/4 of its full size.
Data Graphed:
-The Big Bang Theory states that material expands over time and that was shown as the balloon got bigger.
How does your balloon represent the Big Bang Theory?
-The balloon represents the universe and the dots are the galaxies. As the balloon expands, the distance between the dots or "galaxies" become farther apart.
-Instead of using a balloon, a scientist could make a model showing where everything is and show the universe growing instead of expanding everything.
What will happen to the gravitational force between galaxies as the universe continues to expand?
-The gravitational force will become lesser.
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