What is absolute dating, and what is it based on? What can absolute dating tell us? What will be an ideal response?


Absolute dating provides specific dates for rock units or events in years before present. Most absolute
dating is done by radiometric dating to obtain absolute ages. These are based on the natural decay rates
of radioactive elements present in some rocks

Environmental & Atmospheric Sciences

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Water at 4°C that slightly decreases in temperature

A. contracts. B. expands. C. neither of these D. none of the above

Environmental & Atmospheric Sciences

Extinctions that are relatively rare events that cause worldwide elimination of numerous species, thus opening a wealth of niches for new organisms to fill are known as ________ extinctions.

A. retrograde B. minimal C. mass D. background

Environmental & Atmospheric Sciences

Deserts typically are completely devoid of vegetation and are covered with sand dunes

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

Which of the following is the correct molecular formula for hexane?

A) C6H6 B) C6H10 C) C6H14 D) C6H16

Environmental & Atmospheric Sciences