1.what did you do in this lab?

In this lab, we blowed up a balloon three times. For the first time, we blowed it slightly and marked 6 dots on it to represent different galaxies. Then we measure the distance between dot M and other dots. For the second time, we blowed it half way, and measured it again. And for the last time we blowed it full and do the same thing again.

2.what did the balloon and dots represent?

The ballon represents the expanding universe. The dots represent the galaxies.

3. Trend in your expansion distance

I think the dots that are further apart from dot M will move even further than the other dots when the universe is expanding. In our experiment, dots A, B, and C are relatively close to dots M than dots D and E. And the result is that dot A moved about 1.6cm, B moved 3.4cm, and C moved 3.1cm. On the other hand, dot D moved 7cm and E oved 5cm.

4. your opinion on the value of the activity? What are some things your still curious about?

I think the activity shows how the universe is expanding and how it affects the distance between the galaxies in a visual way. I am still curious about how can the astronomer know how far is the planet from us and how big is the planet.