Course Activity: The Hierarchy and Scale of the Universe 7 of 11
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Part D
Astronomers believe that there is a large cloud of frozen comets called the Oort
cloud, which surrounds our solar system. It lies approximately 50,000 times farther
from the Sun than Earth. Approximately how many squares of toilet paper would you
need to put the Oort cloud on your model? Explain how you arrived at your answer.

Research question: why are the carrots that grew on the left side of the garden larger than the carrots that grew on the right side of the garden? which hypothesis is based on this research question? a comparison of people with gardens to people without gardens will show who is likely to live longer. b. carrots are thought to be good for your eyesight and should be eaten regularly. c. carrots that are provided lots of sunlight grow to a larger size than carrots grown in the shade. d. eating fresh vegetables every day is a healthy thing to do.