Cobalt-60 is a radioactive isotope sometimes used in the treatment of cancer. Which of the following statements is true about an atom of cobalt-60?

A) It contains 27 neutrons.
B) It contains 27 protons.
C) It contains 60 neutrons.
D) It contains 60 protons.


B

Environmental & Atmospheric Sciences

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Which of the following expands most when the temperature is lowered? Equal volumes of

A) iron. B) wood. C) helium. D) water at 4°C. E) None expand when the temperature is lowered.

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If the concentration of carbon dioxide in the atmosphere increases, Earth's average global temperature will

A) increase. B) decrease. C) stay the same. D) fluctuate wildly.

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Sometimes referred to as the "Third Pole" the Tibetan Plateau is home to some 18,000 glaciers. The melt water from these glaciers provides drinking water to over a third of the people on the planet

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

Most of what is today Indonesia was a colony of the:

A) French B) Dutch C) British D) Spanish E) Portuguese

Environmental & Atmospheric Sciences