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FDSCI 101 Day 24

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by

Richard Datwyler

on 10 May 2017

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Transcript of FDSCI 101 Day 24

Scaling the Universe
Review Test Question 1

In discussing observations vs. inferences we could say that in general the better the observation or tools of observation, the better the inferences will be.
A. True
B. False
Review Test question 2

We say that the moon reflects light, and it does. But can we say that it also emits light, or that a person emits light?
A. Yes we can, because its true
B. No we can't, they don't
Review test question 3

Which is not an observation, but rather an inference?
A. At dusk 3 stars were visble around jupiter
B. A different day there were 2 on the left and 1 on the right
C. Today only 2 stars are visible
D. Later a 3rd appeared which must have been elipsed earlier
E. Now 4 stars are seen surounding jupiter
Review test question 4

If we were to observe light from a distant galaxy and the wavelengths were all shifted longer than is known for a particular element spectropscopy we could correctly infer:
A. Nothing, just different light in that part of the galaxy.
B. That galaxy is moving towards us
C. That galaxy is moving away from us
D. That galaxy is moving but we can't tell which direction.
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