Applications to Astronomy: A Hertzsprung-Russell diagram shows stars on a plot of
A. apparent brightness vs. temperature.
B. luminosity vs. temperature.
C. luminosity vs. distance.
D. magnitude vs. apparent brightness.
Answer: B
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The geologic time scale is broken up into time units of different sizes based on
A) eons, eras, periods, and epochs. B) changes in fossilization. C) visible and nonvisible life forms. D) major changes in life forms.
A 100 gram glass container contains 250 grams of water at 
150 grams of water at 
is added to the aluminum container. What is the final temperature of the water and the aluminum? (specific heat of water 
specific heat of aluminum 
a. 37 
B. 31
C. 23
D. 17
E. 12
What is a CCD, and how does it work? Why is it replacing film?
What will be an ideal response?
If the outside air pressure decreases, the reading on a tire gauge connected to a tire decreases
a. True b. False Indicate whether the statement is true or false