A mineral can be composed entirely of one element
Indicate whether the statement is true or false
TRUE
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Which of the following is a greenhouse gas used as a refrigerant and as a solvent during the manufacture of foam?
A. carbon dioxide B. chlorofluorocarbons C. water vapour D. methane
The concept of seafloor spreading was supported by magnetic polarity stripes on the ocean floor
Indicate whether the statement is true or false
In regards to soil-formation, which of the following best describes the role of climate?
A) Relative humidity and atmospheric pressure are the dominant climatic factors that influence soil development. B) Temperature and moisture determine the chemical reactions, organic activity, and water movement within soils. C) Of the five principle soil-forming factors, climate is the least significant with little correlation between soil and climates worldwide. D) Because all soils are ancient, they show the climatic conditions of the period in which they formed.
The first modern astronomer to propose a Sun-centered universe was ________
A) Sir Isaac Newton B) Nicolaus Copernicus C) Galileo D) Tycho Brahe