"Cosmological Redshift" refers to
A. the tendency of light to expand when free of gravitational influences.
B. the expansion of galaxies.
C. the expansion of space itself.
D. the expansion of red giants.
Answer: C
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If the pH of a solution was 7 and you were to increase the hydronium ion concentration 1000×, what would the pH be?
A. 10 B. 7,000 M C. 1 × 10-4 M D. 4 M E. 4
The primates can be divided into two suborders:a
prosimians and simians. b. prosimians and dessimians. c. anthropoids and proanthropoids. d. anthropoids and prosimians. e. proanthropoids and dessimians
By 1970, less that 1% of the U.S. workforce was engaged in agriculture
Indicate whether the statement is true or false
Describe two natural factors that help remove pollutants from the air.
Fill in the blank(s) with the appropriate word(s).