One of the consequences of gold mining in the Amazon Basin has been the release of 100 tons of

mercury each year. Indicate whether the statement is true or false.


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Environmental & Atmospheric Sciences

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A naturally occurring concentration of metallic minerals that can be extracted economically is called ________ whereas any occurrence of useful minerals that are formed in such quantities that eventual extraction is reasonably certain, but not

necessarily profitable, are called ________ resources. Fill in the blank(s) with correct word

Environmental & Atmospheric Sciences

Which of the following correctly describes an electron?

A) on the scale of subatomic particles it is massive and has a +1 charge B) on the scale of subatomic particles it is massive and has a -1 charge C) on the scale of subatomic particles it is light and has a +1 charge D) on the scale of subatomic particles it is light and has a -1 charge

Environmental & Atmospheric Sciences

Water flowing on karst landscapes frequently disappears into ________

A) haystack hills B) swallow holes C) bedding planes D) joints E) hot springs

Environmental & Atmospheric Sciences

The ocean holds more than 97% of Earth's water

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences