Obsidian is a felsic rock, yet has a black color. Explain

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The unexpectedly dark color of this felsic rock results from the presence of tiny crystals of black magnetite scattered throughout transparent glass. Thin slivers of obsidian are colorless, rather than black, which shows that even a low concentration of magnetite crystals strongly affects the color of thick samples.

Environmental & Atmospheric Sciences

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What is the difference between active and passive diapirism and how can we distinguish between them?

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Environmental & Atmospheric Sciences

Replication corresponds to which of the following?

A) the separation of the two strands of DNA to enable the formation of two identical DNA molecules B) the transfer of genetic information from DNA to mRNA C) the transfer of genetic information from mRNA to DNA D) the use of genetic information to synthesize a specific protein

Environmental & Atmospheric Sciences

A(n) _______________ approach to research generally considers and examines all phenomena that are relevant to a given problem or issue

Fill in the blank(s) with correct word

Environmental & Atmospheric Sciences

To see his full height in a mirror, Blinky Bill of height 1.0 meter requires a mirror that is at least

A. 1 m tall. B. 0.50 m tall. C. 0.75 m tall. D. depends on distance from the mirror

Environmental & Atmospheric Sciences