What is a rock-forming mineral? What will be an ideal response?
A mineral that is sufficiently common in a type of rock that it can be used for identification and
classification of that rock type.
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If the amount of radioactive element is 1/8 of the amount originally present, how many half-lives have gone by? Please show your work
What will be an ideal response?
Before the 1980s, chlorofluorocarbons (CFCs) were primarily used as ____.
A. ingredients in fire extinguishers and propellants in aerosol cans B. coolants in air conditioners and industrial solvents C. buoyancy gas in blimps D. ingredients in bleach and propellants in aerosol cans E. coolants in air conditioners and propellants in aerosol cans
The American Forestry Association suggests that each person plant one tree per year in order to compensate for tree loss in urban areas.
Answer the following statement true (T) or false (F)
Temperatures within these features can reach 100 million degrees Kelvin:
A) granules. B) flares. C) sunspots. D) the solar wind.